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(-5x^3)(-2x^2)·1/4x^4-2x^4·(-0.25x^5)
人气:227 ℃ 时间:2019-12-26 04:48:43
解答
(-5x^3)(-2x^2)·1/4x^4-2x^4·(-0.25x^5)
=10x^5·1/4x^4+0.5x^9
=2.5x^9+0.5x^9
=3x^9
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