If your question is
√(9x+81) = x+5
square both sides
9x+81 = x^2 + 10x + 25
x^2 + x - 56 = 0
(x+8)(x-7) = 0
x = -8 or x = 7
A quick check will show that only x=7 is a valid answer
Solve. �ã9x+81=x+5 this is my answer:x=35+3�ã61/2,35-3�ã61/2
is this correct.
1 answer
2 answers