(m+n)²-(m-n)²因式分解
问题描述:
(m+n)²-(m-n)²因式分解
(x²+1)²-4x²这题
答
你好
(m+n)²-(m-n)²
=[(m+n)-(m-n)][(m+n)+(m-n)]
=2n*2m
=4mn
(x²+1)²-4x²
=(x²+1-2x)(x²+1+2x)
=(x-1)²(x+1)²