计算(﹣3a³)²·a³+(﹣4a)²·a的7次方+(﹣5a³)

学习时间:2026-04-02 17:36:56 阅读：3130

计算(﹣3a³)²·a³+(﹣4a)²·a的7次方+(﹣5a³)³(a+3b)(a²+9b²)(a-3b)要过程

清秀的柚子

2026-04-02 17:36:56

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(﹣3a³)²·a³+(﹣4a)²·a的7次方+(﹣5a³)³=9a^6·a³+16a²·a的7次方-125a^9=9a^9+16a^9-125a^9=-100a^9(a+3b)(a²+9b²)(a-3b)=(a+3b)(a-3b)(a²+9b²)=(a²-9b²)(a²+9b²)=a⁴-81b⁴