Mathematics for IGCSE & O level - Equations (Section 7 - No. 22)

What should you do first to solve a quadratic equation by factorization?

Set the equation equal to 0.

Factorize the quadratic expression.

Solve the equation

Find two numbers whose product is 'c' and whose sum is 'b' (in ax²+bx+c=0)

This allows to solve each factor separately.