分解因式3(x+2y)^2-(x-4y)(x+2y)

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分解因式3(x+2y)^2-(x-4y)(x+2y)
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分解因式3(x+2y)^2-(x-4y)(x+2y)
分解因式3(x+2y)^2-(x-4y)(x+2y)

分解因式3(x+2y)^2-(x-4y)(x+2y)
3(x+2y)²-(x-4y)(x+2y)
=(x+2y)[3(x+2y)-(x-4y)]
=(x+2y)(2x+10y)
=2(x+2y)(x+5y)

3(x+2y)^2-(x-4y)(x+2y)
=(x+2y)(3x+6y-x+4y)
=(x+2y)(2x+10y)
=2(x+2y)(x+5y)