(2x+y)∧2-(x+2y)∧2

问题描述:

(2x+y)∧2-(x+2y)∧2

原式=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y)

纯手打~求采纳>