document.write( "Question 942649: When the sum of 397 and four times a positive number is subtracted from the square of the number, the result is 128. Find the number \n" ); document.write( "
Algebra.Com's Answer #574766 by stanbon(75887)\"\" \"About 
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When the sum of 397 and four times a positive number is subtracted from the square of the number, the result is 128. Find the number
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\n" ); document.write( "Equation:
\n" ); document.write( "x^2 - (397+4x) = 128
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\n" ); document.write( "x^2 - 4x - 397 = 128
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\n" ); document.write( "x^2 - 4x - 525 = 0
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\n" ); document.write( "(x - 25)(x+21) = 0
\n" ); document.write( "Positive solution::
\n" ); document.write( "x = 25
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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