(1) X^3+7X+8 (2) 2a^2+b^2+3ab+a-b-6

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(1) X^3+7X+8 (2) 2a^2+b^2+3ab+a-b-6

(1) X^3+7X+8 (2) 2a^2+b^2+3ab+a-b-6
(1) X^3+7X+8
(2) 2a^2+b^2+3ab+a-b-6

(1) X^3+7X+8 (2) 2a^2+b^2+3ab+a-b-6
(1)(x+1)(x^2-x+8)
(2)(2a+b-3)(a+b+2)

(1)原式=x^3+1+7(x+1)=(x+1)(x^2-x+1)+7(x+1)=(x+1)(x^2-x+8)
(2)原式=(2a+b-3)(a+b+2)

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