Respuesta :
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
Y=x^2 + 8x + 7
= (x+4)^2 -16+7
= (x+4)^2 - 9
Minimum value = -9
