Posted by Marie on Friday, March 9, 2012 at 12:45pm.
Solve by completing the square,
8x^2+4x4=0

Math  Reiny, Friday, March 9, 2012 at 12:52pm
divide by 8 and rearrange
x^2 + (1/2)x = 1/2
x^2 + (1/2)x + 1/16 = 1/2 + 1/16
(x + 1/4)^2 = 9/16
x + 1/4 = ± 3/4
x = 1/4 ± 3/4
= 1/2 or 1

Math  Ann, Friday, March 9, 2012 at 2:12pm
Reiny,
Im sorry but where is the 1/16 coming from?

Math  Reiny, Friday, March 9, 2012 at 2:23pm
take half of the middle coefficient , the square it
1/2 of 1/2 is 1/4
1/4 squared is 1/16
I added that to both sides, thus not changing the value of my equation.
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