Question

Graph the equation x^3 = 8 to find its solution.A. 2B. 1C. 8D. 4

Answer 1

Solution

We are given the equation

$x^3=8$

Note:

$\begin{gathered} 2^3=2\times2\times2=8 \\ so\text{ therefore,} \\ 8=2^3 \end{gathered}$

Come back to the equation

$\begin{gathered} x^3=8 \\ x^3=2^3 \\ taking\text{ the cube root of both sides} \\ \sqrt[3]{x^3}=\sqrt[3]{2^3} \\ \\ x=2 \end{gathered}$

Correct Option A

x = 2