Question

Choose whether the following is always sometimes or never true.
x^3 = 3x

Answer 1

Why not sub in dummy values and check.

Answer 2

it's sometimes true... and here's my reason.

when x=0

0^3=3(0)
0=0


but it is not always true because if it was always true,
then when x=1
1^3=3(1)
1=3 but 1 is not equal to 3 hence it is not always true, but can sometimes be true because it works for x=0 :)

Answer 3

so the final answer is, it is sometimes true :)