Mathematics, 24.07.2021 07:30 sakugrey

Chứng minh rằng giá trị biểu thức sau luôn âm với mọi x
-5+4x - x^2

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Chứng minh rằng giá trị biểu thức sau luôn âm với mọi x
-5+4x - x^2...