algebra
posted by jane on .
Need help. please help:
Solve and simplify, use comma to separate answers:
sqrt:9x+55=x+5

√(9x+55) = x+5
9x+55 = (x+5)^2 = x^2 + 10x + 25
x^2 + x  30 = 0
(x+6)(x5) = 0
x = 6,5
Check:
√(54+55) = √1 = 6+5 = 1
√(45+55) = √100 = 5+5 = 10