8. (x2 - 1) (x + 1) (x + 2)(x – 4)
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Step-by-step explanation:
(x2 - 1) (x + 1) (x + 2)(x – 4)
=2x(x+1)-1 (x + 1) (x + 2)(x – 4)
=(2x²+2x-x-1) (x + 2)(x – 4)
=x(2x²+2x-x-1)+2(2x²+2x-x-1) (x-4)
=2x³+2x²-x²-x+4x²+4x-2x-2 (x-4)
=2x³+5x²+5x-2 (x-4)
=x(2x³+5x²+5x-2)-4(2x³+5x²+5x-2)
like this continue
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