factorise xcube+2x square-x-2
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Answer:
(x+1) (x-1) (x+2).
Step-by-step explanation:
3²+2x²-x-2
x²(x+2) -1(x+2)
=(x²-1) (x+2)
=(x+1) (x-1) (x+2).
hence proof
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