Mathematics for IGCSE & O level - Equations (Section 2 - No. 27)
Which technique is appropriate for solving equations of the form (x - a)(x + b) = 0?
Completing the square
Quadratic formula
Setting each factor equal to zero
Multiplying the terms.
คำอธิบาย
The product of two terms equals zero if and only if one of the terms equals zero.