x^3-3=5 — step-by-step solution

Let's solve in

ℝ

x^{3} - 3 = 5

ⓘ We add

3

to both sides

x^{3} = 5 + 3

ⓘ Start from

5

and move forward

3

on the number line:

5 + 3

8

x^{3} = 8

Take the root:

\sqrt[3]{8} = 2

. The power being odd,

x^{3} = 8

has a single real solution,

2

▶Solution obtained:

x = 2