Question

整式乘法,若（2m+2n-1）（2m+2n+1）=63,求m+n

Answer 1

（2m+2n-1）（2m+2n+1）=63

[(2m+2n)-1]*[(2m+2n)+1]=63

(2m+2n)^2-1=63

(2m+2n)^2=64

2m+2n=8或2m+2n=-8

所以m+n=4或-4

学习愉快!