document.write( "Question 430834: I'm trying to help my niece with an algebra problem that has both of us stumped...\r
\n" ); document.write( "\n" ); document.write( "(s+t)(s-t)(s+t)(s-t)\r
\n" ); document.write( "\n" ); document.write( "The answer provided in her book is:\r
\n" ); document.write( "\n" ); document.write( "s^4-2t^2s^2t^2\r
\n" ); document.write( "\n" ); document.write( "I can't even get close to this answer. I got the s^4 and think I got the s^2 and t^2, but I can't figure out the -2t^2.\r
\n" ); document.write( "\n" ); document.write( "If you can tell me what I'm doing wrong, I'd appreciate it. \r
\n" ); document.write( "\n" ); document.write( "I came up with:\r
\n" ); document.write( "\n" ); document.write( "(s)(s)(s)(s) = s^4\r
\n" ); document.write( "\n" ); document.write( "(t)(-t)(t)(-t) = t^2\r
\n" ); document.write( "\n" ); document.write( "I am so confused right now, I don't know what to do. It's been years since I had Algebra.\r
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Algebra.Com's Answer #299123 by shree840(260) $\"\"$ $\"About$

You can put this solution on YOUR website!
(s+t)(s-t)(s+t)(s-t) we will use formula s^2-t^2=(s+t)(s-t)
\n" ); document.write( "(s^2-t^2)(s^2-t^2)
\n" ); document.write( "s^4-2s^2y^2+t^4 ANS\r
\n" ); document.write( "\n" ); document.write( "how did you get T^2 when you multiply the t's \n" ); document.write( "

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