(a+3)(a-1)+a(a+2)
=a²+2a-3+a²+2a
=2a²+4a-3
祝學(xué)習(xí)快樂!謝謝，不過我題目打錯了。再幫我一下吧。（a-3）（a+1）+a(a+2) 化簡后應(yīng)該是2a²-3，然后還要化嗎？（a-3）（a+1）+a(a+2)=a²-2a-3+a²+2a=2a²-3不用在化了，已經(jīng)是最簡了。
(a+3)(a-1)+a(a+2)化簡計算,
(a+3)(a-1)+a(a+2)化簡計算,
數(shù)學(xué)人氣：762 ℃時間：2020-03-27 17:20:32
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