document.write( "Question 224847: (x+y+4)(x+y-4) \n" ); document.write( "

Algebra.Com's Answer #167929 by LtAurora(115) $\"\"$ $\"About$

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Multiply each part as follows:
\n" ); document.write( "First multiply the x in the first term to all of the second terms.
\n" ); document.write( "Second multiply the y in the first term to all of the second terms.
\n" ); document.write( "Third multiply the 4 in the first term to all of the second terms.
\n" ); document.write( "So:
\n" ); document.write( " $\"x%5E2%2Bxy%2B-4x%2Bxy%2By%5E2-4y%2B4x%2B4y-16\"$
\n" ); document.write( "Next combine like terms. Our $\"4x\"$ and $\"-4x\"$ cancel, as do our $\"4y\"$ and $\"-4y\"$ .
\n" ); document.write( " $\"x%5E2%2B2xy%2By%5E2-16\"$ is then our answer. \n" ); document.write( "

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