Question

factorisex³-2x²-x+2by using splitting method

Answer 1

p(x) = x³-2x²-x+2
= x²(x-2)-1(x-2)
= (x²-1) (x-2)
= (x-1) (x+1) (x-2) [by using a²-b²= (a-b) (a+b)]

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