Mathematics for IGCSE & O level - Algebraic Manipulation (Section 5 - No. 14)
When the coefficient of a is not 1, which methods are best for factoring ax² + bx + c?
Trial and error
Factoring by grouping
The quadratic formula
Completing the square
הֶסבֵּר
When the coefficient of a is not one, the methods listed are the most effective.