(-3x³)²-【(2x】
(-3x³)²-【(2x)²】³ 对不起哈,上面的还没打完就被我手残给发出去了
人气:315 ℃ 时间:2020-03-20 20:26:00
解答
=9x^6-(4x^2)^3=9x^6-64x^6=-55x^6
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