document.write( "Question 819482: The square of a number, decreased by ten times the number, is equal to -24. What is the number?\r
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document.write( "We are on the lesson \"Completing the Square\"\r
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document.write( "I tried to put together an equation to help me solve it but it did not turn out well, this is what I put together.
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Algebra.Com's Answer #493124 by richwmiller(17219) You can put this solution on YOUR website! x^2 -10x = -24 \n" ); document.write( "is fine \n" ); document.write( "x^2 -10x +24 =0 \n" ); document.write( "find factors of 24 that add up to -10 \n" ); document.write( "-6 and -4 \n" ); document.write( "(x-6)*(x-4)=0 \n" ); document.write( "x=6 x=4 \n" ); document.write( "check \n" ); document.write( "36-60=-24 \n" ); document.write( "16-40=-24 \n" ); document.write( "ok\r \n" ); document.write( "\n" ); document.write( "but that is not completing the square. \n" ); document.write( "x^2 -10x = -24 \n" ); document.write( "x^2 -10x +25= 1 \n" ); document.write( "(x-5)^2=1 \n" ); document.write( "x-5=+-1 \n" ); document.write( "x=6 \n" ); document.write( "x=4 \n" ); document.write( " \n" ); document.write( " |