AS-level Edexcel Pure Maths - Module 2 Quadratics Q&A(100%)Correct

AS-level Edexcel Pure Maths - Module 2:
Quadratics Q&A(100%)Correct
Quadratic equation - correct answers:Written as ax²+bx+c=0 where a, b, c and constants. Has 0-2
solutions



Roots - correct answers:- The solutions to an equation

- The values of x for which f(x)=0

- Find by factorising x



Completing the square - correct answers:x²+bx = (x+b÷2)²-(b÷2)²



Completing the square when a≠1 - correct answers:- Factorise as much as possible

- Otherwise keep a outside the brackets



Completing the square when a≠1 - method - correct answers:2x²-12x

= 2(x²-6x)

= 2((x-3)²-3²) Complete the square

= 2((x-3)²-9) Simplify

= 2(x-3)²-18 Multiply outside bracket by a



Domain - correct answers:The set of possible inputs of a function

Find through substitution



Range - correct answers:The set of possible outputs of a function

Find through completing the square



∈ - correct answers:Symbol meaning 'a member of'