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OpenStudy (anonymous):
What number must you add to complete the square? x^2 + 6x = 13
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OpenStudy (hba):
ADD 3 ON BOTH SIDES
OpenStudy (anonymous):
what? o_o...
OpenStudy (stephstar101):
It's actually 9 >.< (b/2)^2
OpenStudy (anonymous):
\[a^2 + 2ab + b^2 = (a+b)^2\] 2ab here is 6x, with a = x. b = 3 so b^2 = 9
OpenStudy (anonymous):
(x+3)^2
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