Question

Find the maximum value of the quadratic function.

Answer 1

-49.

Explanation:

Convert to vertex form:

f(x) = -7x^2 - 14x - 56

= -7(x^2 + 2x + 8)

= -7 [(x + 1)^2 - 1 + 8)

= 7(x + 1)^2 - 49

- so the maximum value is -49.