document.write( "Question 184090: x^2 - 12x =45
\n" ); document.write( "x^2 -12x +36=81 (need to know how my text book got +36 and 81)
\n" ); document.write( "(x-6)^2 =81
\n" ); document.write( "x-6= +-9\r
\n" ); document.write( "\n" ); document.write( "x= +-9 +6
\n" ); document.write( "x=15 or -3
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Algebra.Com's Answer #138099 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
I really can't anwer the question you raised but your solution is the correct one!
\n" ); document.write( "Remember, book-answers are not infallible!
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