document.write( "Question 104678: FIND EACH PRODUCT
\n" ); document.write( "(3Y^2 + 1) (3Y^2 - 1) \n" ); document.write( "

Algebra.Com's Answer #76188 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%283Y%5E2+%2B+1%29+%283Y%5E2+-+1%29\"$
\n" ); document.write( "Use the FOIL method (First, Outer, Inner, Last)
\n" ); document.write( "First $\"%28highlight%283Y%5E2%29+%2B+1%29+%28highlight%283Y%5E2%29+%2B+%28-1%29%29\"$ : $\"3Y%5E2%2A3Y%5E2\"$
\n" ); document.write( "Outer $\"%28highlight%283Y%5E2%29+%2B+1%29+%283Y%5E2+%2B+highlight%28%28-+1%29%29%29\"$ : $\"3Y%5E2%2A%28-1%29\"$
\n" ); document.write( "Inner $\"%283Y%5E2+%2B+highlight%281%29%29+%28highlight%283Y%5E2%29+%2B%28-1%29%29\"$ : $\"%281%29%2A3Y%5E2\"$
\n" ); document.write( "Last $\"%283Y%5E2+%2B+highlight%281%29%29+%283Y%5E2+%2B+highlight%28%28-1%29%29%29\"$ $\"1%2A%28-1%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%283Y%5E2+%2B+1%29+%283Y%5E2+-+1%29\"$ = $\"3Y%5E2%2A3Y%5E2%2B3Y%5E2%2A%28-1%29%2B%281%29%2A3Y%5E2%2B1%2A%28-1%29\"$
\n" ); document.write( " $\"%283Y%5E2+%2B+1%29+%283Y%5E2+-+1%29\"$ = $\"9Y%5E4-cross%283Y%5E2%29%2Bcross%283Y%5E2%29-1\"$
\n" ); document.write( " $\"%283Y%5E2+%2B+1%29+%283Y%5E2+-+1%29\"$ = $\"9Y%5E4-1\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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