desireediggs
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Factor by grouping: x^3+2x^2−6x−12. Which of the following is one of the factors?
A) (x^2−6x)
B) (x^2−6)
C) (x^2+2)
D) (x−2)

Answer :

x³+2x²-6x-12=x²•(x+2)-6(x+2)=(x+2)•(x²-6)

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