Mathematics for IGCSE & O level - Equations (Section 3 - No. 31)
When can the quadratic formula be applied?
Only with factorable quadratic equations.
To any quadratic equation.
Only with equations where the coefficient of x² is 1.
When an equation is written in the form y = mx+b.
Paaiškinimas
The quadratic formula is a universal method for solving any quadratic equation.