For 10 here is the answer and for 9 i’ll reply to my comment
X^3-2x is an algebraic expression. Note that there is NO "=" sign here.
x^4 + 4x^2 + 4 = 0 is an algebraic equation. Note the presence of an "=" sign.
For this case we have a factored expression, of a second degree equation:
(
To find the solutions:
we add 3 to both sides of the equation:

We subtract 8 on both sides of the equation:

Thus, the solutions of the equation are:

Answer:
