有關5a22a的精選大全

(5a2+2a﹣1)-4(3﹣8a+2a2)  
問題詳情:(5a2+2a﹣1)-4(3﹣8a+2a2)  【回答】解:原式=5a2+2a﹣1-12+32a-8a2        =(5a2-8a2)+(2a+32a)-(1+12)        =-3a2+34a-13…4分                               ...
先化簡,再求值:(5a2+2a﹣1)﹣4(3﹣8a+2a2),其中a=﹣1.
問題詳情:先化簡,再求值:(5a2+2a﹣1)﹣4(3﹣8a+2a2),其中a=﹣1.【回答】【解答】解:原式=5a2+2a﹣1﹣12+32a﹣8a2=﹣3a2+34a﹣13.當a=﹣1時,原式=﹣3﹣34﹣13=﹣50.知識點:整式的加減題型:計算題...
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