document.write( "Question 96890: x+3=square root of x+15 \n" ); document.write( "

Algebra.Com's Answer #70525 by edjones(8007) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x%2B3=sqrt%28x%2B15%29\"$
\n" ); document.write( "Square both sides. $\"%28x%2B3%29%5E2=x%2B15\"$
\n" ); document.write( " $\"x%5E2%2B6x%2B9=x%2B15\"$
\n" ); document.write( "subtract x+15 from both sides. $\"x%5E2%2B5x-6=0\"$
\n" ); document.write( "(x-1)(x+6)=0
\n" ); document.write( "x=1 x=-6
\n" ); document.write( "Check:
\n" ); document.write( " $\"1%2B3=sqrt%281%2B15%29\"$ ok
\n" ); document.write( " $\"-6%2B3=sqrt%28-6%2B15%29\"$
\n" ); document.write( " $\"-3%3C%3E3\"$
\n" ); document.write( "x=1 is the only correct answer.
\n" ); document.write( "Ed \n" ); document.write( "

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