4(3m+2n)²-9(2m+3n)²分解因式
问题描述:
4(3m+2n)²-9(2m+3n)²分解因式
答
[2(3m+2n)]^2-[3(2m+3n)]^2=[2(3m+2n)+3(2m+3n)][2(3m+2n)-3(2m+3n)]=(12m+13n)(-5n)
4(3m+2n)²-9(2m+3n)²分解因式
[2(3m+2n)]^2-[3(2m+3n)]^2=[2(3m+2n)+3(2m+3n)][2(3m+2n)-3(2m+3n)]=(12m+13n)(-5n)