(x+2y)^2-(x-3y)^2 因式分解.
问题描述:
(x+2y)^2-(x-3y)^2 因式分解.
答
(x+2y)^2-(x-3y)^2=(x+2y+x-3y)(x+2y-(x-3y))=(2x-y)(5y)=5y(2x-y)
答
(x+2y)^2-(x-3y)^2
=(x+2y+x-3y)(x+2y-x+3y)
=5y*(2x-y)
答
平方差公式
原式=(x+2y+x-3y)(x+2y-x+3y)
=5y(2x-y)