Question

Identify all of the following solutions of sqrtx-8 + 8 = x .
x = 8
x = 9
x = 8 and x = 9
None of the above

Answer 1

is it x-8 under sqr or just x?

Answer 2

\[\sqrt{x-8}+8 = x\]
\[\sqrt{x-8} = x-8\]
Let k = x-8.
\[\sqrt{k} = k\]
\[k = 0,1\]
Thus
\[x-8= 0,1\]
\[x= 8,9\]