(2x+y)的平方 - (x+2y)的平方~提取公因式~
问题描述:
(2x+y)的平方 - (x+2y)的平方~提取公因式~
答
(2x+y)^2-(x+2y)^2
=[(2x+y)+(x+2y)][(2x+y)-(x+2y)]
=(3x+3y)(x-y)
=3(x+y)(x-y).
答
(2x+y)的平方 - (x+2y)的平方
=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y)
答
(2x+y)的平方 - (x+2y)的平方
=4x方+4xy+y方-x方-4xy-4y方
=3x方-3y方
=3(x方-y方)
=3(x+y)(x-y)