Posted by **Carol** on Friday, May 28, 2010 at 2:01am.

x^2-6x-7=0 Completing the square

need help

- math -
**bobpursley**, Friday, May 28, 2010 at 8:29am
what is half of -6 squared: 6/2=3, squared , 9

x^2-6x+9 -7=9

(x-3)^2 =16

take the square root of each side.

x-3= +-4

x=7, or -1

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