Algebra
posted by Jack on .
Solve. ã9x+81=x+5 this is my answer:x=35+3ã61/2,353ã61/2
is this correct.

If your question is
√(9x+81) = x+5
square both sides
9x+81 = x^2 + 10x + 25
x^2 + x  56 = 0
(x+8)(x7) = 0
x = 8 or x = 7
A quick check will show that only x=7 is a valid answer