document.write( "Question 879256: Bill and Jenna are solving the quadratic equation x 2 - x = 12.\r
\n" ); document.write( "\n" ); document.write( "Bill solved this way Jenna solved this way
\n" ); document.write( "x2 - x = 12
\n" ); document.write( "x(x - 1) = 12
\n" ); document.write( "x = 12 or 13 x2 - x = 12
\n" ); document.write( "x2 - x - 12 = 0
\n" ); document.write( "(x - 4)(x + 3) = 0
\n" ); document.write( "x = 4 or x = -3
\n" ); document.write( "Which student is correct?\r
\n" ); document.write( "\n" ); document.write( "What error did the other student make when solving?\r
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Algebra.Com's Answer #797301 by Riley12(3)\"\" \"About 
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The correct student is Jenna.
\n" ); document.write( "The error that Bill made when he was solving was that he used the zero product property incorrectly. The equation should be A*B=0, with the right side equaling 0 to work.
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