maths funny
回答 (1)
2009-09-23 4:37 am
✔ 最佳答案
25(x+2/5)^2=9[ 5(x + 2/5) ]^2 = 3^2 or = (-3)^2
5(x + 2/5) = 3 or 5(x + 2/5) = - 3
5x + 2 = 3 or 5x + 2 = - 3
x = 1/5 or x = - 1
收錄日期: 2021-04-21 22:02:57
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