What is the solution when y equals 2x plus 1 is a tangent to the circle 5y2 plus 5x2 equals 1?

What is the solution when y equals 2x plus 1 is a tangent to the circle 5y2 plus 5x2 equals 1?
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Answer :

If y = 2x+1 is a tangent line to the circle 5y^2 +5x^2 = 1 thenthe point of contact is at (-2/5, 1/5) because it has equalroots
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