Question 43333
First one:

{{{cartoon(sqrt(x) - 1 = 3,
sqrt(x) - 1 = highlight(3),
sqrt(x) - 1 - highlight(3) = 0,
sqrt(x) - 4 = 0,
sqrt(x) - highlight(4) = 0,
sqrt(x) = highlight(4),
sqrt(x) = 4,
(sqrt(x))^2 = 4^2,
x = 16
)}}}

Second one:

{{{cartoon(sqrt(x^3) = 8,
(sqrt(x^3))^2 = 8^2,
x^3 = 64,
x = root(3, 64),
x = 4
)}}}