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(-3x^2y)(-5x-2y 1)
人气:339 ℃ 时间:2020-05-08 23:18:42
解答
(-3x²y)(-5x-2y+1)
=(-3x²y)(-5x)+(-3x²y)(-2y)+(-3x²y)
=15x³y+6x²y²-3x²y
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