document.write( "Question 109859: I am really confused at the AC concept. Can someone please help? Thanks!\r
\n" ); document.write( "\n" ); document.write( "Use the ac test to determine if x^2 +2x-15 can be factored. Find the values of m and n if it can be factored. \r
\n" ); document.write( "\n" ); document.write( "Use the ac test to determine if x^2-3x+7 can be factored. Find the values of m and n if it can be factored. \n" ); document.write( "
Algebra.Com's Answer #80059 by stanbon(75887)\"\" \"About 
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Use the ac test to determine if x^2 +2x-15 can be factored. Find the values of m and n if it can be factored.
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\n" ); document.write( "Think of two numbers whose product is A*C=-15 and whose sum = B= 2
\n" ); document.write( "The numbers are 5 and -3
\n" ); document.write( "Replace 2x with 5x-3x in the original problem:
\n" ); document.write( "x^2+5x-3x-15
\n" ); document.write( "Factor the 1st two and the last two terms separately:
\n" ); document.write( "x(x+5)-3(x+5)
\n" ); document.write( "Factor again to get the final answer:
\n" ); document.write( "(x+5)(x-3)
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\n" ); document.write( "\n" ); document.write( "Use the ac test to determine if x^2-3x+7 can be factored. Find the values of m and n if it can be factored.
\n" ); document.write( "Think of two numbers whose product is AC = 1*7 = 7 and whose sum = B= -3
\n" ); document.write( "There are no such numbers so this quadratic cannot factored by the AC Method.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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