document.write( "Question 589933: how would this be solved using foil. i dont undestand (c+4)(c-5) \n" ); document.write( "
Algebra.Com's Answer #418147 by ReadingBoosters(3246)\"\" \"About 
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(c+4)(c-5)
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\n" ); document.write( "c(c) + c(-5) + 4(c) + 4(-5)
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\n" ); document.write( "\"c%5E2+-+5c+%2B+4c+-+20\"
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\n" ); document.write( "\"c%5E2+-+c+-+20\"
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