SOLUTION: Someone.....please help!!!! 7s+1 (all under the radical sign) - 2 radical sign s= 2 book gives the answer as 9, can someone show me how???

Question 60934: Someone.....please help!!!!
7s+1 (all under the radical sign) - 2 radical sign s= 2
book gives the answer as 9, can someone show me how???
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve:
Add to both sides.
Square both sides.
Subtract 4s from both sides.
Subtract 4 from both sides.
Square both sides.
Subtract 64s from both sides.
Solve using the quadratic formula:

=
=
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