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这样写答案:
-1,3,4 (a)
5,2 (a)
3,-2/5,1 (两个root次序对调不要紧) (a)
1,5 (a)
x^2+3x+5=0 (a)
答案要弄到没有分母 (a)
不要分母 (a)
(a)
5/2 (a)
根号这样写:
sqrt(15)
这就是根号15的写法 (a)
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