Card 1 of 20
In the expansion of (x+a)2(x+a)^2(x+a)2, the coefficient of xxx is always [...]\text{[...]}[...].
A
Halve the coefficient of xxx to get the value inside the bracket: (x+b2)2(x + \frac{b}{2})^2(x+2b)2.
B
In the context of quadratic equations, the roots are the xxx-coordinates where the parabola crosses the xxx-axis.
C
When completing the square for a(x+B)2+Ca(x+B)^2+Ca(x+B)2+C, the term CCC is found by expanding the bracket and adjusting the constant.
D
In the expansion of (x+a)2(x+a)^2(x+a)2, the coefficient of xxx is always 2a\boxed{2a}2a.
Card 1 of 20
2.2 Completing the Square Flashcards
20 flashcards on Edexcel A Level Maths 2.2 Completing the Square: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.