Mathematics for IGCSE & O level - Equations (Section 1 - No. 27)

What is the purpose of setting each factor to zero after factoring a quadratic equation?

To find the y-intercept of the equation.

To find the roots of the equation.

To find the vertex of the equation.

To simplify the equation.

By setting each factor to zero, you're solving for the values of x that make the original quadratic equation equal to zero, which are the roots.