x^2-2√3 x+2=0
Find the nature by ∆ 方法
answer: It has 2 unequal irrational roots.
如果我照delta方法找會是RATIONAL.
究竟以∆ 方法有咩錯?
Nature of quad. equation(F.4)
2008-09-12 2:03 am
回答 (1)
2008-09-12 2:27 am
✔ 最佳答案
The delta method has no problem. Delta is rational but the roots are irrational!Since sqrt(b^2 - 4ac) = 2 is rational. But the roots = [2sqrt 3 +/- 2]/2 = sqrt 3 +/- 1
are irrational.
收錄日期: 2021-04-13 16:03:55
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