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数学
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3t的平方+2t-1=0
人气:431 ℃ 时间:2020-04-21 03:02:06
解答
3t的平方+2t-1=0
3t的平方+2t-1
=(t+1)*(3t-1)
故3t的平方+2t-1=0
即(t+1)*(3t-1)=0
得t=-1,或t=1/3.
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