Here it is. ab+2b-4a-8 Thanks the answer given is (a+2)(b-4) but not sure how to get it.
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Originally Posted by MathMack Here it is. ab+2b-4a-8 Thanks the answer given is (a+2)(b-4) but not sure how to get it. Factor out b, out of the first two terms. Factor out -4 out of the last two terms. $\displaystyle b(a + 2) - 4(a + 2)$ $\displaystyle = (b - 4)(a + 2)$
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