document.write( "Question 1066107: Find the equation of the quadratic function with zeros 10 and 12 and vertex at (11, -2)\r
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Algebra.Com's Answer #681279 by Edwin McCravy(20066)\"\" \"About 
You can put this solution on YOUR website!
Substitute the vertex (x,y) = (11,-2) into each one\r\n" );
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document.write( "1. y=2x²-44x+120 \r\n" );
document.write( "  -2=2(11)²-44(11)+120\r\n" );
document.write( "  -2=2(121)-484+120\r\n" );
document.write( "  -2=242-484+120\r\n" );
document.write( "  -2=-122\r\n" );
document.write( "False, so 1 is eliminated\r\n" );
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document.write( "2. y=2x²-44x-240\r\n" );
document.write( "  -2=2(11)²-44(11)-240\r\n" );
document.write( "  -2=2(121)-484-240\r\n" );
document.write( "  -2=242-484-240\r\n" );
document.write( "  -2=-482\r\n" );
document.write( "False, so 2 is eliminated\r\n" );
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document.write( "3. y=2x²-44x+240\r\n" );
document.write( "  -2=2(11)²-44(11)+240\r\n" );
document.write( "  -2=2(121)-484+240\r\n" );
document.write( "  -2=242-484+240\r\n" );
document.write( "  -2=-2\r\n" );
document.write( "True, so 3 is possible\r\n" );
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document.write( "4. y=-2x²-44x+240\r\n" );
document.write( "  -2=-2(11)²-44(11)+240\r\n" );
document.write( "  -2=-2(121)-484+240\r\n" );
document.write( "  -2=-242-484+240\r\n" );
document.write( "  -2=-486\r\n" );
document.write( "False, so 4 is eliminated\r\n" );
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document.write( "So the only possibility is 3.\r\n" );
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document.write( "Lots of times, eliminating the incorrect choices is\r\n" );
document.write( "easier than solving the problem.\r\n" );
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document.write( "Edwin
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