Question

Solve x^2 + 9x + 9 = 0.

Answer 1

Possible intermediate steps:
x^2+9 x+9 = 0
Subtract 9 from both sides:
x^2+9 x = -9
Add 81/4 to both sides:
x^2+9 x+81/4 = 45/4
Factor the left hand side:
(x+9/2)^2 = 45/4
Take the square root of both sides:
sqrt(x+9/2) = (3 sqrt(5))/2
Eliminate the absolute value:
x+9/2 = -(3 sqrt(5))/2 or x+9/2 = (3 sqrt(5))/2
Subtract 9/2 from both sides:
x = -3/2 (3+sqrt(5)) or x+9/2 = (3 sqrt(5))/2
Subtract 9/2 from both sides:
x = -3/2 (3+sqrt(5)) or x = 3/2 (-3+sqrt(5))

Answer 2

http://mathway.com/math_image.aspx?p=xSMB02ZSMB03APPRSMB02zSMB03-1.145898,-7.854102?p=212?p=22 and http://mathway.com/math_image.aspx?p=xSMB01SMB02FSMB033(-3+SMB02RSMB035SMB02rSMB03)SMB102SMB02fSMB03,SMB02FSMB033(-3-SMB02RSMB035SMB02rSMB03)SMB102SMB02fSMB03?p=181?p=42

Answer 3

There you go.

Answer 4

Thank you.