document.write( "Question 612895: Factor this expression completely. Note: Place factors alphabetically.\r
\n" ); document.write( "\n" ); document.write( "ab + 4 + a + 4b\r
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Algebra.Com's Answer #385770 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
ab + 4 + a + 4b \r
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\n" ); document.write( "\n" ); document.write( "ab + a + 4 + 4b \r
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\n" ); document.write( "\n" ); document.write( "(ab + a) + (4 + 4b)\r
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\n" ); document.write( "\n" ); document.write( "a(b + 1) + (4 + 4b)\r
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\n" ); document.write( "\n" ); document.write( "a(b + 1) + 4(1 + b)\r
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\n" ); document.write( "\n" ); document.write( "a(b + 1) + 4(b + 1)\r
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\n" ); document.write( "\n" ); document.write( "(a + 4)(b + 1)\r
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\n" ); document.write( "\n" ); document.write( "So ab + 4 + a + 4b completely factors to (a + 4)(b + 1)
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