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rivencyber
2 năm trước
Chứng minh đa thức sau không có nghiệm ? f(x) = 6x^2 + 9 M ( x ) = x^4 + x^2 + 6 g(x) = -x^4 -1 N ( x ) = -x^4 - x^2 - 1 h(x) = - | 2x+1 |-3 P ( x ) = -x^2 -5 k(x) = x^2 + 5
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