document.write( "Question 1035827: The sqare of the difference between a number and 7 is 9. find the number(s) \n" ); document.write( "

Algebra.Com's Answer #650445 by josmiceli(19441) $\"\"$ $\"About$

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$\"+%28+n+-+7+%29%5E2+=+9+\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"+n+-+7+=+3+\"$
\n" ); document.write( "Add $\"+7+\"$ to both sides
\n" ); document.write( " $\"+n+=+10+\"$
\n" ); document.write( "----------------------
\n" ); document.write( "Now take the negative square root of $\"+9+\"$
\n" ); document.write( " $\"+n+-+7+=+-3+\"$
\n" ); document.write( " $\"+n+=+4+\"$
\n" ); document.write( "-------------
\n" ); document.write( "The numbers are 4 and 10
\n" ); document.write( "-----------------------
\n" ); document.write( "check answers:
\n" ); document.write( " $\"+%28+n+-+7+%29%5E2+=+9+\"$
\n" ); document.write( " $\"+%28+10+-+7+%29%5E2+=+9+\"$
\n" ); document.write( " $\"+3%5E2+=+9+\"$
\n" ); document.write( " $\"+9+=+9+\"$
\n" ); document.write( "OK
\n" ); document.write( "----------------------
\n" ); document.write( " $\"+%28+n+-+7+%29%5E2+=+9+\"$
\n" ); document.write( " $\"+%28+4+-+7+%29%5E2+=+9+\"$
\n" ); document.write( " $\"+%28-3%29%5E2+=+9+\"$
\n" ); document.write( " $\"+9+=+9+\"$
\n" ); document.write( "OK \n" ); document.write( "

\n" );