SOLUTION: x2-5x-14=0 solve in completing the square in quadratic equation

Question 615350: x2-5x-14=0 solve in completing the square in quadratic equation
Found 2 solutions by nerdybill, unlockmath:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!

take 1/2 'b', square it and add to both sides:

x = 5/2 +-9/2
.
x = {-4/2, 14/2}
or
x = {-2, 7}

Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
First, let's add 14 to both sides.
x2-5x=14
Add 25/4 to both sides:
x2-5x+25/4=20 1/4
Factor this to:
(x-5/2)^2=20 1/4
Now square root both sides:
x-5/2=+-9/2
Add 5/2 to get:
x=7
x=-2
Make sense?
RJ
www.math-unlock.com
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