document.write( "Question 331047: Solve 9x^2-81=0 \n" ); document.write( "

Algebra.Com's Answer #237327 by stanbon(75887) $\"\"$ $\"About$

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Solve 9x^2-81=0
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\n" ); document.write( "9(x^2-9) = 0
\n" ); document.write( "Divide by 9 to get:
\n" ); document.write( "(x^2-9) = 0
\n" ); document.write( "Factor:
\n" ); document.write( "(x-3)(x+3) = 0
\n" ); document.write( "x = 3 or x = -3
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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