document.write( "Question 75945: 16x^2-36=?
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Algebra.Com's Answer #54530 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Are you supposed to be factoring or solving for x?
\n" ); document.write( "16x^2-36=?
\n" ); document.write( "This is the difference of perfect squares the rule for that is \"highlight%28a%5E2-b%5E2=%28a%2Bb%29%28a-b%29%29\".\r
\n" ); document.write( "\n" ); document.write( "\"%284x%29%5E2-%286%29%5E2=%284x%2B6%29%284x-6%29\"
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\n" ); document.write( "9x^2+81=?
\n" ); document.write( "This is the sum of perfect squares and is prime. It can't be factored or solved unless you have started using the complex number system.
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\n" ); document.write( "If you have started using complex numbers or need these solved for x let me know.
\n" ); document.write( "Happy Calculating!!!
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