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(t+3t^2-3)-(-t+4t^2) 化简
人气:245 ℃ 时间:2020-02-05 02:52:56
解答
(t+3t^2-3)-(-t+4t^2)=t+3t^2-3+t-4t^2=-t^2+2t-3=-(t^2-2t+1)-2
=-(t-1)^2-2
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