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phamuanth
2 năm trước
Cho phưong trình: -3x^2 - 5x-2 = 0. Với x1,x2 là nghiệm của phương trình, không giải phương trình, hãy tính: a) m =x1+ 1 /x1 + 1/x2 +x2 b)n= 1/x+3 +1 /x2+3
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