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April 21, 2014

Homework Help: math

Posted by kayla on Thursday, July 12, 2007 at 5:13pm.

x^2-9x-4=6
solve by completing the square
show steps plz :D

Add 4 to both sides. What is 1/2 of -9? Then square that, and add it to both sides.

Now, on the left, you have a perfect square.. (x-9/2). Take the square root of each side. Remember the right side will be +-.

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