factorise the question: a ^3-a-6
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Answer:
(a-2)(a^2+2a+3)
Step-by-step explanation:
a^3-a-6
= a^3-2a^2+a^2-6
= a^2(a-2)+2a(a-2)+3(a-2)
= (a-2)(a^2+2a+3).
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