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数学
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9(x-2)²=4(x+1)²用因式分解发捐
人气:447 ℃ 时间:2020-05-05 18:21:29
解答
9(x-2)²=4(x+1)²
(3(x-2))²-(2(x+1))²=0
(3(x-2)+2(x+1))*(3(x-2)-2(x+1))=0
所以,3(x-2)+2(x+1)=0或3(x-2)-2(x+1)=0
所以,x=4/5或x=8.
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