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(-2x²y)³+8(x²)²×(-x²)×(-y)³ 怎么做?
人气:445 ℃ 时间:2020-07-17 07:55:40
解答
(-2x²y)³+8(x²)²×(-x²)×(-y)³
=-8x^6y³+8x^4×(-x²)×(-y³)
=-8x^6y³+8x^4×x²×y³
=-8x^6y³+8x^6y³
=0
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