因式分解 m方+2mn+n方-2m-2n-8
问题描述:
因式分解 m方+2mn+n方-2m-2n-8
答
(m+n+2)(m+n-4)
答
m²+2mn+n²-2m-2n-8
=(m+n)²-2(m+n)-8
=(m+n-4)(m+n+2)