Question

Find all solutions to the equation,
x-8(sqrt x)+16=0. Is x=16 the only solution?

Answer 1

8 sqrt x = x+16

64 x = x^2 + 32 x + 256

x^2 -32 x + 256 = 0

(x- 16)^2 = 0

x = 16 is the only root I see