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数学
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X^2-20X-3750=0解方程!
在线等30分钟后结束!
如果上面那道解不了,(1+25%)*X分之1*3000=X-20
说到做到!
人气:143 ℃ 时间:2020-04-07 08:40:31
解答
x^2-2*10x+10^2-(10^2+3750)=0
(x-10)^2=3850
x-10=正负5倍根号154
x=10加减正负5倍根号154
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