document.write( "Question 268378: factor the trinomial: 6r^2-60r+126 \n" ); document.write( "
Algebra.Com's Answer #197126 by stanbon(75887)\"\" \"About 
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6r^2-60r+126
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\n" ); document.write( "Common factor: 6
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\n" ); document.write( "= 6(r^2-10r+21)
\n" ); document.write( "Think of two numbers whose product is 21 and whose sum is -10.
\n" ); document.write( "The numbers are -7 and -3
\n" ); document.write( "Replace -10r by -7r-3r
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\n" ); document.write( "= 6(r^2-7r-3r+21)
\n" ); document.write( "Factor the 1st 2 and the last 2 terms separately.
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\n" ); document.write( "= 6[(r(r-7)-3(r-7)]
\n" ); document.write( "Factor again:
\n" ); document.write( "= 6[(r-7)(r-3)]
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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