document.write( "Question 392208: I find no factoring for 27r2 - 72 = 0. I want to know how the answer of 0=0 is calculated? Thanks. \n" ); document.write( "

Algebra.Com's Answer #278369 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"27r%5E2-72+=+0\"$ Factor 9.
\n" ); document.write( " $\"9%283r%5E2-8%29+=+0\"$ so...
\n" ); document.write( " $\"3r%5E2-8+=+0\"$ Add 8 to both sides.
\n" ); document.write( " $\"3r%5E2+=+8\"$ Divide both sides by 3.
\n" ); document.write( " $\"r%5E2+=+8%2F3\"$ Take the square root.
\n" ); document.write( " $\"r+=+sqrt%288%2F3%29\"$ \n" ); document.write( "

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