Question

Which is the minimum value of the function y=x^2+8x+7

Answer 1

You can do this by completing the square.
Y=x^2 + 8x + 7
= (x+4)^2 -16+7
= (x+4)^2 - 9

Minimum value = -9

Answer 2

The minimum value of the function is (-4, -9).