Find the Roots (Zeros) x(x-4)

If any individual factor on the left side of the equation is equal to ${\displaystyle 0}$, the entire expression will be equal to ${\displaystyle 0}$.

Set ${\displaystyle x}$ equal to ${\displaystyle 0}$.

Set ${\displaystyle x-4}$ equal to ${\displaystyle 0}$ and solve for ${\displaystyle x}$.

The final solution is all the values that make ${\displaystyle x(x-4)=0}$ true.