提公因式﹙2x+y﹚²-﹙x+2y﹚²
2个回答

﹙2x+y﹚²-﹙x+2y﹚²

=[﹙2x+y﹚+﹙x+2y﹚][﹙2x+y﹚-﹙x+2y﹚]

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

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

3ax²-3ay²

=3a(x²-y²)

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