Simplify (2x- 5y)3 – (2x+ 5y)3. -Maths 9th

Simplify (2x- 5y)3 – (2x+ 5y)3. -Maths 9th
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(2x -5y)3 – (2x + 5y)3 = [(2x)3 – (5y)3 – 3(2x)(5y)(2x – 5y)] -[(2x)3 + (5y)3 + 3(2x)(5y)(2x+5y)] [using identity, (a – b)3 = a3 -b3 – 3ab  and (a + b)3 =a3 +b3 + 3ab] = (2x)3 – (5y)3 – 30xy(2x – 5y) – (2x)3– (5y)3 – 30xy (2x + 5y) = -2 (5y)3 – 30xy(2x – 5y + 2x + 5y) = -2 x 125y3 – 30xy(4x) = -250y3 -120x2y
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Related questions

Simplify (2x- 5y)3 – (2x+ 5y)3. -Maths 9th

Description : Simplify (2x- 5y)3 – (2x+ 5y)3. -Maths 9th

Last Answer : (2x -5y)3 - (2x + 5y)3 = [(2x)3 - (5y)3 - 3(2x)(5y)(2x - 5y)] -[(2x)3 + (5y)3 + 3(2x)(5y)(2x+5y)] [using identity, (a - b)3 = a3 -b3 - 3ab and (a + b)3 =a3 +b3 + 3ab] = (2x)3 - (5y)3 - ... 2x)3- (5y)3 - 30xy (2x + 5y) = -2 (5y)3 - 30xy(2x - 5y + 2x + 5y) = -2 x 125y3 - 30xy(4x) = -250y3 -120x2y

Simplify: (2x–5y)3 – (2x + 5y)3 -Maths 9th

Description : Simplify: (2x–5y)3 – (2x + 5y)3 -Maths 9th

Last Answer : Solution :-

The linear equation 2x – 5y = 7 has -Maths 9th

Description : The linear equation 2x – 5y = 7 has -Maths 9th

Last Answer : (c) In the given equation 2x – 5y = 7, for every value of x, we get a corresponding value of y and vice-versa. Therefore, the linear equation has infinitely many solutions.

The equation 2x+ 5y = 7 has a unique solution, if x and y are -Maths 9th

Description : The equation 2x+ 5y = 7 has a unique solution, if x and y are -Maths 9th

Last Answer : (a) In natural numbers, there is only one pair i.e., (1, 1) which satisfy the given equation but in positive real numbers, real numbers and rational numbers there are many pairs to satisfy the given linear equation.

The linear equation 2x – 5y = 7 has -Maths 9th

Description : The linear equation 2x – 5y = 7 has -Maths 9th

Last Answer : (c) In the given equation 2x – 5y = 7, for every value of x, we get a corresponding value of y and vice-versa. Therefore, the linear equation has infinitely many solutions.

The equation 2x+ 5y = 7 has a unique solution, if x and y are -Maths 9th

Description : The equation 2x+ 5y = 7 has a unique solution, if x and y are -Maths 9th

Last Answer : (a) In natural numbers, there is only one pair i.e., (1, 1) which satisfy the given equation but in positive real numbers, real numbers and rational numbers there are many pairs to satisfy the given linear equation.

Expand using suitable identity (-2x + 5y - 3z) to the whole square. -Maths 9th

Description : Expand using suitable identity (-2x + 5y - 3z) to the whole square. -Maths 9th

Last Answer : Solution :-

How many solutions does the equation 2x +5y=8 has? -Maths 9th

Description : How many solutions does the equation 2x +5y=8 has? -Maths 9th

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Simplify: (i) (a + b + c)2 + (a – b + c)2 (ii) (a + b + c)2 – (a – b + c)2 (iii) (a + b + c)2 + (a – b + c)2 + (a + b – c)2 (iv) (2x + p – c)2 – (2x – p + c)2 (v) (x2 + y2 – z2)2 – (x2 – y2 + z2)2 -Maths 9th

Description : Simplify: (i) (a + b + c)2 + (a – b + c)2 (ii) (a + b + c)2 – (a – b + c)2 (iii) (a + b + c)2 + (a – b + c)2 + (a + b – c)2 (iv) (2x + p – c)2 – (2x – p + c)2 (v) (x2 + y2 – z2)2 – (x2 – y2 + z2)2 -Maths 9th

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6x^+17xy+5y^ -Maths 9th

Description : 6x^+17xy+5y^ -Maths 9th

Last Answer : what we have to do to this question??? we have to factorise or do something else?

6x^+17xy+5y^ -Maths 9th

Description : 6x^+17xy+5y^ -Maths 9th

Last Answer : what we have to do to this question??? we have to factorise or do something else?

Find the following products: (i) (3x + 2y) (9X2 – 6xy + Ay2) (ii) (4x – 5y) (16x2 + 20xy + 25y2) (iii) (7p4 + q) (49p8 – 7p4q + q2) -Maths 9th

Description : Find the following products: (i) (3x + 2y) (9X2 – 6xy + Ay2) (ii) (4x – 5y) (16x2 + 20xy + 25y2) (iii) (7p4 + q) (49p8 – 7p4q + q2) -Maths 9th

Last Answer : answer:

If 9x2 + 25y2 = 181 and xy = -6, find the value of 3x + 5y. -Maths 9th

Description : If 9x2 + 25y2 = 181 and xy = -6, find the value of 3x + 5y. -Maths 9th

Last Answer : answer:

Using the function f(x,y) =2x+ 5y determine the maximum value of the region if the point are (-2,3),(5,-3), and (1,4)?

Description : Using the function f(x,y) =2x+ 5y determine the maximum value of the region if the point are (-2,3),(5,-3), and (1,4)?

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A line through the origin intersects the parabola `5y=2x^(2)-9x+10` at two points whose x-coordinates add up to 17. Then the slope of the line is ____

Description : A line through the origin intersects the parabola `5y=2x^(2)-9x+10` at two points whose x-coordinates add up to 17. Then the slope of the line is ____

Last Answer : A line through the origin intersects the parabola `5y=2x^(2)-9x+10` at two points whose x- ... 17. Then the slope of the line is __________ .

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Description : What are the points of intersection of the line 2x plus 5y equals 4 with the curve y squared equals x plus 4?

Last Answer : If: 2x +5y = 4 then 25y^2 = 4x^2 -16x +16If: y^2 = x +4 then 25y^2 = 25x +100So: 4x^2 -16x +16 = 25x +100Transposing terms: 4x^2 -41x -84 = 0Factorizing the above: (4x+7)(x-12) = 0 meaning x = -7/4 or x =12By substitution into original equation points of intersection:(-7/4, 3/2) and (12, -4)

The coordinates of the points where 2x + 5y – 10 =0 meets y axis is e) (0 , 2) f) (0 , -2) g) (2 , 2) h) (-2 , -2)

Description : The coordinates of the points where 2x + 5y – 10 =0 meets y axis is e) (0 , 2) f) (0 , -2) g) (2 , 2) h) (-2 , -2)

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The coordinates of the points where 2x + 5y – 10 =0 meets y axis is a) (0 , 2) b) (0 , -2) c) (2 , 2) d) (-2 , -2)

Description : The coordinates of the points where 2x + 5y – 10 =0 meets y axis is a) (0 , 2) b) (0 , -2) c) (2 , 2) d) (-2 , -2)

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A pair of linear equations which has a unique solution x = 2, y = -3 is (a) x + y = -1 ; 2x – 3y = -5 (b) 2x + 5y = -11 ; 4x + 10y = -22(c) 2x – y = 1 ; 3x + 2y = 0 (d) x – 4y – 14 = 0 ;5x – y – 13 = 0

Description : A pair of linear equations which has a unique solution x = 2, y = -3 is (a) x + y = -1 ; 2x – 3y = -5 (b) 2x + 5y = -11 ; 4x + 10y = -22(c) 2x – y = 1 ; 3x + 2y = 0 (d) x – 4y – 14 = 0 ;5x – y – 13 = 0

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Simplify the question -Maths 9th

Description : Simplify the question -Maths 9th

Last Answer : After rationalizing it 42/11

Simplify by combining similar terms: -Maths 9th

Description : Simplify by combining similar terms: -Maths 9th

Last Answer : 5√2 + 20√2 = (5+20)√2 = 25√2

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : Reducing into simplest form √12 = √22 × 3 = 2√3 √75 = √3 × 52 = 5√3 Therefore 4√3 - 3√12 + 2√75 = 4√3 - 3 × 2√3 + 2 × 5√3 = 4√3 - 6√3 + 10√3 = (4 - 6 + 10) √3 = 8√3

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : Reducing into simplest form √8 = √(22× 2) = 2 × √2 √32 = √(22 × 22 × 2) = 2 × 2√2 = 4√2 ∴ √8 + √32 - √2 = 2√2 + 4√2 - √2 = (2 + 4 -1) √2 = 5√2 .

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : √12 = √(22 × 3) = 2√3 √50 = √(2 × 52) = (5 √2) √48 = √(22 × 22 × 3) = (2 × 2√3)= 4√3 ∴ 4√12 - √50 - 7 √48 = 4 × 2√3 - 5√2 - 7 × 4√3 = 8√3 - 5√2 - 28√3 = (8 -28)√3 - 5√2 = -20√3 - 5√2

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : Reducing into simplest form

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : √14 × √21 = √14 × 21 = √2 × 7 × 3 × 7 = √2 × 3 × 72 = 7√6

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : √15 × √7 = √15 × 7 = √105

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : 3√4 × 3√22 = 3√4 × 22 = 3√22 × 2 × 11 =3√23 × 11 = 23√11

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : L.C.M. of 3,4 of 12 3√2 = 12√24 = 12√16 4√3 = 12√33 = 12√27 3√2 × 4√3 = 12√16 × 12√27 = 12√(16×27) = 12√432

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : 4√12 × 7√6 = 28√12 × 6 = 28√62 × 2 = 28 × 6√2 = 168√2.

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : L.C.M. of 3,2 is 6 3√2 = 6√22 = 6√4 √5 = 6√53 = 6√125 3√2 × √5 = 6√4 × 6√125 = 6√(4 × 125) = 6√500 .

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : 4√28 / 3√7 = 4√28 / 3√7 4√28 / 3√7 = 4 / 3√4 = 4 / 3 × 2 = 8 / 3

Simplify the following question -Maths 9th

Description : Simplify the following question -Maths 9th

Last Answer : Simplification of following question

Simplify by rationalizing the denominator : -Maths 9th

Description : Simplify by rationalizing the denominator : -Maths 9th

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simplify (2a + b)3 + (2a - b)3 -Maths 9th

Description : simplify (2a + b)3 + (2a - b)3 -Maths 9th

Last Answer : (2a + b)3 + (2a - b)3 = (8a3 + 12a2b + 3ab2 + b3 ) + (8a3 - 12a2b + 3ab2 - b3) = 16a3 + 6ab2

Simplify the following -Maths 9th

Description : Simplify the following -Maths 9th

Last Answer : Simplification:

Simplify the following question : -Maths 9th

Description : Simplify the following question : -Maths 9th

Last Answer : Simplification of following number

Simplify the following question : -Maths 9th

Description : Simplify the following question : -Maths 9th

Last Answer : Simplification

Simplify the question -Maths 9th

Description : Simplify the question -Maths 9th

Last Answer : After rationalizing it 42/11

Simplify by combining similar terms: -Maths 9th

Description : Simplify by combining similar terms: -Maths 9th

Last Answer : 5√2 + 20√2 = (5+20)√2 = 25√2

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : Reducing into simplest form √12 = √22 × 3 = 2√3 √75 = √3 × 52 = 5√3 Therefore 4√3 - 3√12 + 2√75 = 4√3 - 3 × 2√3 + 2 × 5√3 = 4√3 - 6√3 + 10√3 = (4 - 6 + 10) √3 = 8√3

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : Reducing into simplest form √8 = √(22× 2) = 2 × √2 √32 = √(22 × 22 × 2) = 2 × 2√2 = 4√2 ∴ √8 + √32 - √2 = 2√2 + 4√2 - √2 = (2 + 4 -1) √2 = 5√2 .

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : √12 = √(22 × 3) = 2√3 √50 = √(2 × 52) = (5 √2) √48 = √(22 × 22 × 3) = (2 × 2√3)= 4√3 ∴ 4√12 - √50 - 7 √48 = 4 × 2√3 - 5√2 - 7 × 4√3 = 8√3 - 5√2 - 28√3 = (8 -28)√3 - 5√2 = -20√3 - 5√2

Simplify by combining similar terms : -Maths 9th

Description : Simplify by combining similar terms : -Maths 9th

Last Answer : Reducing into simplest form

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : √14 × √21 = √14 × 21 = √2 × 7 × 3 × 7 = √2 × 3 × 72 = 7√6

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : √15 × √7 = √15 × 7 = √105

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : 3√4 × 3√22 = 3√4 × 22 = 3√22 × 2 × 11 =3√23 × 11 = 23√11

Simplify and express the result in its simplest form : -Maths 9th

Description : Simplify and express the result in its simplest form : -Maths 9th

Last Answer : 4√12 × 7√6 = 28√12 × 6 = 28√62 × 2 = 28 × 6√2 = 168√2.