Mathematics for IGCSE & O level - Algebraic Manipulation (Section 1 - No. 25)
If an expression can be factored by completing the square, what is the resulting form?
The difference of two squares
A perfect square trinomial
A binomial multiplied by a constant
Two binomials multiplied
解释
Completing the square results in transforming part of the expression into a perfect square trinomial, i.e., (x + a)²