document.write( "Question 421036: 49x^2 -25=0\r
\n" ); document.write( "\n" ); document.write( "Find all the roots and check your answer \n" ); document.write( "

Algebra.Com's Answer #294047 by josmiceli(19441) $\"\"$ $\"About$

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$\"+49x%5E2+-+25+=+0+\"$
\n" ); document.write( " $\"+49x%5E2+=+25+\"$
\n" ); document.write( " $\"+%287x%29%5E2+=+5%5E2\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"+7x+=+5+\"$
\n" ); document.write( " $\"x+=+5%2F7\"$
\n" ); document.write( "and, taking the negative square root of $\"5%5E2\"$
\n" ); document.write( " $\"7x+=+-5\"$
\n" ); document.write( " $\"x+=+-5%2F7\"$
\n" ); document.write( "The roots are 5/7 and -5/7
\n" ); document.write( "check answer:
\n" ); document.write( " $\"x+=+5%2F7\"$
\n" ); document.write( " $\"+x+-+5%2F7+=+0+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"x+=+-5%2F7\"$
\n" ); document.write( " $\"+x+%2B+5%2F7+=+0+\"$
\n" ); document.write( " $\"+%28x+-+5%2F7%29%2A%28+x+%2B+5%2F7%29+=+0+\"$
\n" ); document.write( " $\"+x%5E2+-+25%2F49+=+0+\"$
\n" ); document.write( " $\"x%5E2+=+25%2F49\"$
\n" ); document.write( " $\"+49x%5E2+=+25+\"$
\n" ); document.write( "OK \n" ); document.write( "

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