document.write( "Question 211437: I need help factoring some equations please help:\r
\n" ); document.write( "\n" ); document.write( "2. 16xy + 32yz – 20xyz
\n" ); document.write( "3. 9x2 – 64
\n" ); document.write( "4. 5x3 – 125u2x
\n" ); document.write( "5. x2 + 7x + 12 \r
\n" ); document.write( "\n" ); document.write( "Please explain to me how to do these because I am confused and old. \n" ); document.write( "
Algebra.Com's Answer #159788 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
2. 16xy + 32yz – 20xyz
\n" ); document.write( "All terms are even numbers and have a y
\n" ); document.write( "4y*(4x + 8z - 5xz)
\n" ); document.write( "That's all that can be done.
\n" ); document.write( "---------------
\n" ); document.write( "3. 9x2 – 64
\n" ); document.write( "Any difference of 2 squares is a plus and minus situation
\n" ); document.write( "(3x + 8)*(3x - 8)
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\n" ); document.write( "4. 5x3 – 125u2x
\n" ); document.write( "Factor out the 5x
\n" ); document.write( "= 5x*(x^2 - 25u^2)
\n" ); document.write( "Then there's difference to 2 squares
\n" ); document.write( "= 5x*(x - 5u)*(x + 5u)
\n" ); document.write( "--------------
\n" ); document.write( "5. x2 + 7x + 12
\n" ); document.write( "For this one, look for factors of 12 that add to 7.
\n" ); document.write( "12 = 1*12 --> 13 NG
\n" ); document.write( "12 = 2*6 --> 8 NG
\n" ); document.write( "12 = 3*4 -- 7 That's it
\n" ); document.write( "= (x+3)*(x+4)
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