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Anonymous
4x3 + 16x2 - 180x = 4x(x2 + 4x - 45)
= 4x(x + 9)(x - 5)
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4x(x + 9)(x - 5)
x4 - 4x3 - 12x2 -32x + 64 (x - 4)(x + 2)(x + 2)(x - 4)
gcf of 4x3=6 gcf of 3x8=8
(x - 3)(x + 1)(x + 2)(x + 4)
because 4X3=12
(x^2 + 1)(x^2 - 4x + 13)