Question 231064: X^2+4X=9
Answer by troymuga(3)   (Show Source):
You can put this solution on YOUR website! Method: Completing the Square.
x² + 4x + 9 =
Subtract 9 from both sides.
x² + 4x = -9
Now you're ready to complete the square.
x² + 4x + ______ = -9 + ______
Take the coefficient of the x term: 4
Divide it by 2: 4/2 = 2
Square it: 2² = 4
Add this to both sides.
x² + 4x + 4 = -9 + 4
(x + 2)² = -5
Add 5 to both sides.
(x + 2)² + 5
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