Which system of equations can be used to find the roots of the equation 4 x squared is equal to x cubed plus 2 x ?

To find the roots, look for the x-values where the two sides of 4x² = x³ + 2x are equal. Represent each side as a separate equation for y: y = 4x² and y = x³ + 2x. Their intersections have x-values that satisfy the original equation, so the correct choice is D.

AI-written and checked against the verified answer.