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OpenStudy (anonymous):
what number should be added to complete the square of the following... x^2-12x
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OpenStudy (anonymous):
half of 12 is 6 and 6 squared is 36 add 36
OpenStudy (anonymous):
so 72?
OpenStudy (whpalmer4):
"add 36" is what he said...
OpenStudy (anonymous):
thanks
OpenStudy (whpalmer4):
\[x^2-12x+36 = (x-6)(x-6)\]right?
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OpenStudy (whpalmer4):
do you understand why that works?
OpenStudy (anonymous):
not really
OpenStudy (anonymous):
okay now i got it! thanks
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