document.write( "Question 637696: Solve 36⋅x2 - 81 = 0 by using square roots. \n" ); document.write( "

Algebra.Com's Answer #401826 by MathLover1(20849) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"36x%5E2-81=0\"$ ...both sides divide by $\"9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"36x%5E2%2F9-81%2F9=0%2F9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"4x%5E2-9=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%282x%29%5E2-3%5E2=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%282x-3%29%282x%2B3%29=0\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( " $\"%282x-3%29=0\"$ ......->.. $\"2x=3\"$ ....->.. $\"x=3%2F2\"$
\n" ); document.write( "and
\n" ); document.write( " $\"%282x%2B3%29=0\"$ ......->.. $\"2x=-3\"$ ....->.. $\"x=-3%2F2\"$ \n" ); document.write( "

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