Need help. please help:

Question

Solve and simplify, use comma to separate answers:

sqrt:9x+55=x+5

Answer 1

√(9x+55) = x+5
9x+55 = (x+5)^2 = x^2 + 10x + 25

x^2 + x - 30 = 0
(x+6)(x-5) = 0

x = -6,5

Check:
√(-54+55) = √1 = -6+5 = 1
√(45+55) = √100 = 5+5 = 10