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计算:(5a²+2a-1)-4(3-8a+2a²)
人气:484 ℃ 时间:2020-04-18 09:12:57
解答
(5a²+2a-1)-4(3-8a+2a²)
=5a²+2a-1-12+32a-8a²
=(5a²-8a²)+(2a+32a)+(-1-12)
=-3a²+34a-13
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