document.write( "Question 964131: Please help me with these questions. I don't understand them that well.\r
\n" ); document.write( "\n" ); document.write( "2x= $\"+sqrt+%284x%5E2-8x-9%29+\"$ \r
\n" ); document.write( "\n" ); document.write( "3x= $\"+sqrt+%288x%5E2%2B9%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+sqrt+%28-5x%29\"$ = $\"+sqrt+%28x%2B4%29\"$ \r
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Algebra.Com's Answer #589031 by macston(5194) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( " $\"2x=sqrt%284x%5E2-8x-9%29\"$ Square both sides
\n" ); document.write( " $\"4x%5E2=4x%5E2-8x-9\"$ Subtract $\"4x%5E2\"$ from each side.
\n" ); document.write( " $\"0=-8x-9\"$ Add 8x to each side.
\n" ); document.write( " $\"8x=-9\"$ Divide each side by 8
\n" ); document.write( " $\"x=-9%2F8\"$
\n" ); document.write( ".
\n" ); document.write( "CHECK:
\n" ); document.write( " $\"2%28-9%2F8%29=sqrt%284%28-9%2F8%29%5E2-8%28-9%2F8%29-9%29\"$
\n" ); document.write( " $\"-18%2F8=sqrt%284%2881%2F64%29%2B9-9%29\"$
\n" ); document.write( " $\"-18%2F8=sqrt%28324%2F64%29\"$
\n" ); document.write( " $\"-18%2F8\"$ =+- $\"%2818%2F8%29\"$
\n" ); document.write( ".
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\n" ); document.write( " $\"3x=sqrt%288x%5E2%2B9%29\"$ Square both sides.
\n" ); document.write( " $\"9x%5E2=8x%5E2%2B9\"$ Subtract $\"8x%5E2\"$ from each side.
\n" ); document.write( " $\"x%5E2=9\"$ Find the square root of each side.
\n" ); document.write( " $\"x=3\"$
\n" ); document.write( ".
\n" ); document.write( "CHECK:
\n" ); document.write( " $\"3x=sqrt%288x%5E2%2B9%29\"$
\n" ); document.write( " $\"3%283%29=sqrt%288%283%5E2%29%2B9%29\"$
\n" ); document.write( " $\"9=sqrt%2872%2B9%29\"$
\n" ); document.write( " $\"9=sqrt%2881%29\"$
\n" ); document.write( " $\"9\"$ =+- $\"9\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"sqrt%28-5x%29=sqrt%28x%2B4%29\"$ Square both sides.
\n" ); document.write( " $\"-5x=x%2B4\"$ Subtract x from each side.
\n" ); document.write( " $\"-6x=4\"$ Divide each side by -6.
\n" ); document.write( " $\"x=-4%2F6\"$ = $\"-2%2F3\"$
\n" ); document.write( ".
\n" ); document.write( "CHECK:
\n" ); document.write( " $\"sqrt%28-5x%29=sqrt%28x%2B4%29\"$
\n" ); document.write( " $\"sqrt%28-5%28-2%2F3%29%29=sqrt%28%28-2%2F3%29%2B4%29\"$
\n" ); document.write( " $\"sqrt%2810%2F3%29=sqrt%28%28-2%2F3%29%2B12%2F3%29\"$
\n" ); document.write( " $\"sqrt%2810%2F3%29=sqrt%2810%2F3%29\"$ \r
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