document.write( "Question 1156900: Working backwards write a quadratic equation that will have solutions of x = 3 and x = -7.\r
\n" ); document.write( "\n" ); document.write( "Working backwards write a quadratic equation that will have solutions of x = 12 and x = 2.\r
\n" ); document.write( "\n" ); document.write( "Thank you
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Algebra.Com's Answer #779683 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Note that if $\"+x+=+3+\"$ , then $\"+x+-+3+=+0+\"$ ,
\n" ); document.write( "and $\"+x+=+3+\"$ is a root of the quadratic
\n" ); document.write( " $\"+f%28x%29+=+%28+x+-+3+%29%2A%28+x+-%28-7%29+%29+\"$
\n" ); document.write( " $\"+f%28x%29+=+%28+x+-+3+%29%2A%28+x+%2B+7+%29+\"$
\n" ); document.write( " $\"+f%28x%29+=+x%5E2+-+3x+%2B+7x+-+21+\"$
\n" ); document.write( " $\"+f%28x%29+=+x%5E2+%2B+4x+-+21+\"$
\n" ); document.write( "--------------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+x+=+3+\"$
\n" ); document.write( " $\"+f%283%29+=+3%5E2+%2B+4%2A3+-+21+\"$
\n" ); document.write( " $\"+f%283%29+=+9+%2B+12+-+21+\"$
\n" ); document.write( " $\"+f%283%29+=+0+\"$
\n" ); document.write( "You can check ( x = -7 )
\n" ); document.write( "============================
\n" ); document.write( " $\"+f%28x%29+=+%28+x+-+12+%29%2A%28+x+-+2+%29+\"$
\n" ); document.write( "Multiply this out and follow the 1st answer\r
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