SOLUTION: help Solve the quadratic equation by completing the square. x^2 +8x+11=0

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Question 1173044: help
Solve the quadratic equation by completing the square.
x^2 +8x+11=0

Found 3 solutions by ewatrrr, ikleyn, josgarithmetic:
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website!

Hi,
Solve the quadratic equation by completing the square.
x^2 +8x+11 + 5 = 5
x^2 +8x+16 = 5
(x+4)^2 = 5
(x+4) = ± √5
x = -4 ± √5
checking our work with Quadratic Formula
x =(-8 ± √(64- 44))/2
x =( -8 ± √(20))/2
x =( -8 ± 2√(5))/2
x = -4 ± √(5)
Wish You the Best in your Studies.

Answer by ikleyn(52780)   (Show Source):
You can put this solution on YOUR website!
.

On completing the square, see the lesson
    - HOW TO solve quadratic equation by completing the square - Learning by examples
in this site.

Learn the subject from there.

Answer by josgarithmetic(39617)   (Show Source):
You can put this solution on YOUR website!

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