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因式分解3xy²-6xy²+9y³
是3x²y-6xy²+9y³
人气:290 ℃ 时间:2019-11-04 14:13:09
解答
3x²y-6xy²+9y³
=3y(x²-2xy+y²+2y²)
=3y[(x-y)²+2y²]
=3y[(x-y)²-(-2)y²]
=3y[x-y-√(-2)y][x-y+√(-2)y]
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