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数学
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用因式分解25x^2-9=0
人气:484 ℃ 时间:2020-02-06 04:31:02
解答
25x²-9=0
25x²=9
x²=9/25
x=±3/5
因式分解
25x²-9=0
(5x+3)(5x-3)=0
x=-3/5或x=3/5
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