Solve: `(x^2 - 3x)^2 - 16 (x^2-3x) -36 =0`

Solve: `(x^2 - 3x)^2 - 16 (x^2-3x) -36 =0`
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Solve: `(x^2 - 3x)^2 - 16 (x^2-3x) -36 =0`
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