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4x + 32x + 9 = 36x + 9
16x2 + 32x - 65 = 0 factorises (4x + 13)(4x - 5) This makes x either -13/4 or 5/4.
x4/(5*4)/32x 4x/(20)/32x (x/5)/32x x/160x 1/160
If you mean 4x-32x-4 = 0, the answer is x= -1/7
(4x-8)2 = (4x-8)(4x-8) = 16x2-32x-32x+64 = 16x2-64x+64