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(﹣2x²y)³+(8x²)²×(-x)²×(-y)³ 怎么计算?
人气:208 ℃ 时间:2020-05-27 11:52:07
解答
原式=-8x(的6次方)y³+64x(的4次方) ×x²× (-y³ )=-8x(的6次方)y³+64x(的6次方)× (-y³ )=-8x(的6次方)y³-64x(的6次方)y³ =-72x(的6次方)y³上标实在...
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