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nhungkappi
2 năm trước
Cho phương trình: $x^{2}-2(m-1)x-4m-1=0$ a) Chứng minh phương trình trên luôn có 2 nghiệm phân biệt với mọi m. b) Gọi $x_{1},x_{2}$ là 2 nghiệm của phương trình Chứng minh rằng: $x_{1}^{2}.(x_{2}+2)+5x_{1}+2x_{1}x_{2}=0$ Giúp mình với QvQ
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