Question

10. Find the maximum/minimum value of the quadratic expression -4x2 +8x+3.

(a) Minimum value is 7.

(c) Minimum value is -7.

(b) Maximum value is -7.

(d) Maximum value is 7.​

Answer 1

ANSWER :-

$\implies\sf{-4x2 +8x+3.}$

$\implies \sf{-4*7^{2}+8*7+3=-137 }$

so,

(a) Minimum value is 7.

                  (or)

(b) Maximum value is -7.​