Factories X^3-2x^2-x+2
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Preeti Dabral 3 years, 3 months ago
Given that x3 − 2x2 − x+2
= x3 − x− 2x2 +2
Grouping the 1st 2 terms together and the 2nd 2 together:
= x(x2 − 1) − 2(x2 − 1)
= (x2 − 1) (x−2)
Using the identity: a2 − b2 = (a+b) (a−b)
= (x2−12) (x−2)
= (x−1) (x+1) (x−2)
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