用平方差公式分解因式(2X+y)²-(x+2y)²

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用平方差公式分解因式(2X+y)²-(x+2y)²

用平方差公式分解因式(2X+y)²-(x+2y)²
用平方差公式分解因式(2X+y)²-(x+2y)²

用平方差公式分解因式(2X+y)²-(x+2y)²
(2X+y)²-(x+2y)²
=(2X+Y-X-2Y)(2X+Y+X+2Y)
=(X-Y)(3X+3Y)
=3(X-Y)(X+Y)

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

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

=(2X+y+x+2y)(2X+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y)
=3x²-y²