factorise
x^3 + 2x^2 - x-2
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Answer:
- (x + 2) * (x - 1) * (x + 1)
Step-by-step explanation:
x³ + 2x² - x - 2 =
= x² * (x + 2) - (x + 2) =
= (x + 2) * (x² - 1) =
= (x + 2) * (x - 1) * (x + 1)
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