Respuesta :

prestonshelton
Hello!

You can plug the answers in for x and see if it is right

x^2 + 8x = 33

-11^2 + 8(-11) = 33

121 - 88 = 33

3^2 + 8(3) = 33

9 + 24 = 33

So the answer is the first one

Hope this helps!
Bladerunner1976
[tex]x^2 + 8x = 33 \\ x^2 + 8x + ( \frac{8}{2})^2 = 33 + ( \frac{8}{2})^2 \\ x^2 + 8x + 16 = 33 + 16 \\ (x + 4)^2 = 49 \\ x + 4 = \pm 7 \\ x = 7 - 4 = 3 \\ x = -7 - 4 = -11[/tex]

Your answers are {3, -11}