已知m+n=6,m-n=4,求代数式(m^2+n^2-25)^2-4m^2n^2的值

问题描述:

已知m+n=6,m-n=4,求代数式(m^2+n^2-25)^2-4m^2n^2的值
因式分解解题

m+n=6,m-n=4,
m=5 n=1
(m^2+n^2-25)^2-4m^2n^2
=(25+1-25)^2-4*25*1
=1-100
=-99