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Mathematics 9 Online
OpenStudy (anonymous):

what number should be added to complete the square of the following... x^2-12x

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?

OpenStudy (whpalmer4):

do you understand why that works?

OpenStudy (anonymous):

not really

OpenStudy (anonymous):

okay now i got it! thanks

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