document.write( "Question 147739: find the product
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\n" ); document.write( "\n" ); document.write( "a)100+140x+49x^2
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\n" ); document.write( "c)100+140x+7x^2
\n" ); document.write( "d)100x^2+140x+49
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Algebra.Com's Answer #108119 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"%2810%2B7x%29%5E2\" Start with the given expression.\r
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\n" ); document.write( "\n" ); document.write( "\"%2810%2B7x%29%2810%2B7x%29\" Expand. Remember something like \"x%5E2=x%2Ax\".\r
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\n" ); document.write( "\n" ); document.write( "Now let's FOIL the expression.\r
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\n" ); document.write( "\n" ); document.write( "Remember, when you FOIL an expression, you follow this procedure:\r
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\n" ); document.write( "\n" ); document.write( "\"%28highlight%2810%29%2B7x%29%28highlight%2810%29%2B7x%29\" Multiply the First terms:\"%2810%29%2A%2810%29=100\".\r
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\n" ); document.write( "\n" ); document.write( "\"%28highlight%2810%29%2B7x%29%2810%2Bhighlight%287x%29%29\" Multiply the Outer terms:\"%2810%29%2A%287%2Ax%29=70%2Ax\".\r
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\n" ); document.write( "\n" ); document.write( "\"%2810%2Bhighlight%287x%29%29%28highlight%2810%29%2B7x%29\" Multiply the Inner terms:\"%287%2Ax%29%2A%2810%29=70%2Ax\".\r
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\n" ); document.write( "\n" ); document.write( "\"%2810%2Bhighlight%287x%29%29%2810%2Bhighlight%287x%29%29\" Multiply the Last terms:\"%287%2Ax%29%2A%287%2Ax%29=49%2Ax%5E2\".\r
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\n" ); document.write( "\n" ); document.write( "\"100%2B70%2Ax%2B70%2Ax%2B49%2Ax%5E2\" Now collect every term to make a single expression.\r
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\n" ); document.write( "\n" ); document.write( "\"100%2B140%2Ax%2B49%2Ax%5E2\" Now combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So \"%2810%2B7x%29%5E2\" FOILS to \"100%2B140%2Ax%2B49%2Ax%5E2\".\r
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\n" ); document.write( "\n" ); document.write( "In other words, \"%2810%2B7x%29%5E2=100%2B140%2Ax%2B49%2Ax%5E2\".
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