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If (b^2-4a c)^2(1+4a^2)<64 a^2, a<0 , th...

If `(b^2-4a c)^2(1+4a^2)<64 a^2, a<0` , then maximum value of quadratic expression `a x^2+b x+c` is always less than a. 0 b. 2 c. -1 d. -2

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