The quadratic formula \(x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\) is derived from completing the square of the general quadratic equation \(ax^2 + bx + c = 0\). It works for all quadratic equations regardless of whether the roots are real or complex, rational or irrational. The discriminant \((b^2 - 4ac)\) determines the nature of the roots but doesn't prevent the formula from being applicable.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• Dickson Tembo – 1 pts

• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• Area of Rectilinear Figures
• Distance of A Straight Line