Mathematics for IGCSE & O level - Algebraic Manipulation (Section 4 - No. 39)
Which expressions can be simplified by completing the square?
x² + 4x + 3
2x² - 3x + 1
x² - 6x + 9
x² + 9
Giải thích
Completing the square is applicable to quadratic expressions like x² + bx + c.