分解因式(2x+y)²-(x+2y)² 详解》》》!

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分解因式(2x+y)²-(x+2y)² 详解》》》!
分解因式(2x+y)²-(x+2y)² 详解》》》!

分解因式(2x+y)²-(x+2y)² 详解》》》!
平方差
原式=[(2x+y)+(x+2y)][(2x+y)-(x+2y)]
=(3x+3y)(x-y)
=3(x+y)(x-y)

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

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

(2x+y)²-(x+2y)²
=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y)
提示:运用平方差公式