Factorise : xpower3 - 2xpower2 - x + 2
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Answer:
x^3-2x^2-x+2
=x^2(x-2)-1(x-2)
=(x-2)(x^2-1)
=(x-2){(x)^2-(1)^2}
=(x-2)(x+1)(x-1)
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