Mathematics for IGCSE & O level - Equations (Section 1 - No. 42)
In which form can a quadratic expression be written after completing the square?
(x + p)² + q
ax² + bx + c
x² + bx + c
(x - p)² - q
คำอธิบาย
Completing the square rewrites the quadratic expression into a perfect square form.