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(1/4)( 64 x² -32x +4) - 8x +8 = 13 + 20x + 16 x²
16 x² - 8x + 1 - 8x + 8 = 13 + 20x + 16x²
-16x +9 = 20x + 13
36 x = 9 - 13 = -4
x = -4/36
x = - 1/9