document.write( "Question 75054: If i factoring the following binomials please let me know if this is right\r
\n" ); document.write( "\n" ); document.write( "25x^2-81y^2\r
\n" ); document.write( "\n" ); document.write( "25x^2-81y^2=(5x+y)^2=(9x-y)^2 \n" ); document.write( "

Algebra.Com's Answer #53883 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
Factor:
\n" ); document.write( " $\"25x%5E2-81y%5E2\"$ Do you recognise this as the difference of two squares?
\n" ); document.write( " $\"%285x%29%5E2-%289y%29%5E2\"$
\n" ); document.write( "The difference of two squares is factored thus:
\n" ); document.write( " $\"A%5E2-B%5E2+=+%28A-B%29%28A%2BB%29\"$ Applying this to your problem:
\n" ); document.write( " $\"%285x%29%5E2-%289y%29%5E2+=+%285x-9y%29%285x%2B9y%29\"$ \n" ); document.write( "

\n" );