document.write( "Question 60934: Someone.....please help!!!!
\n" ); document.write( "7s+1 (all under the radical sign) - 2 radical sign s= 2
\n" ); document.write( "book gives the answer as 9, can someone show me how??? \n" ); document.write( "

Algebra.Com's Answer #41878 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
Solve:
\n" ); document.write( " $\"sqrt%287s%2B1%29-2sqrt%28s%29+=+2\"$ Add $\"2sqrt%28s%29\"$ to both sides.
\n" ); document.write( " $\"sqrt%287s%2B1%29+=+2sqrt%28s%29%2B2\"$ Square both sides.
\n" ); document.write( " $\"7s%2B1+=+4s%2B8sqrt%28s%29%2B4\"$ Subtract 4s from both sides.
\n" ); document.write( " $\"3s%2B1+=+8sqrt%28s%29%2B4\"$ Subtract 4 from both sides.
\n" ); document.write( " $\"3s-3+=+8sqrt%28s%29\"$ Square both sides.
\n" ); document.write( " $\"9s%5E2-18s%2B9+=+64s\"$ Subtract 64s from both sides.
\n" ); document.write( " $\"9s%5E2-82s%2B9+=+0\"$ Solve using the quadratic formula: $\"s+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a\"$
\n" ); document.write( " $\"s+=+%28-%28-82%29%2B-sqrt%28%28-82%29%5E2-4%289%29%289%29%29%29%2F2%289%29\"$
\n" ); document.write( " $\"s+=+%2882%2B-sqrt%286742-324%29%29%2F18\"$
\n" ); document.write( " $\"s+=+%2882%2B-sqrt%286400%29%29%2F18\"$
\n" ); document.write( " $\"s+=+%2882%2B-80%29%2F18\"$
\n" ); document.write( " $\"s+=+%2882%2B80%29%2F18\"$ = $\"162%2F19+=+9\"$
\n" ); document.write( " $\"s+=+%2882-80%29%2F18\"$ = $\"2%2F18+=+1%2F9\"$ \n" ); document.write( "

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