Mathematics for IGCSE & O level - Algebraic Manipulation (Section 1 - No. 21)
How do you find the value to add inside the parenthesis to complete the square in x² + bx + c?
Multiply c by 2.
Divide b by 2 and square the result.
Multiply b and c.
Subtract b from c.
解释
The process involves taking half of the coefficient of the x term (b/2) and squaring the result.