數學因式分解
回答 (1)
2010-02-08 5:40 am
✔ 最佳答案
(x+2)(√2 - 1) = 3(x+2)(√2 - 1)(√2 + 1) = 3(√2 + 1)
(x+2)(2 - 1) = 3(√2 + 1)
x + 2 = 3(√2 + 1)
x = 3(√2 + 1) - 2
x = 3√2 + 3 - 2
x = 3√2 + 1
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