Factorising Flashcards
1
Q
x ^2 - a^2
A
(x - a)(x + a)
2
Q
x^3 - a^3
A
(x - a)(x^2 + ax + a^2)
3
Q
x^3 + a^3
A
(x + a)(x^2 - ax + a^2)
4
Q
discriminant
A
b^2 – 4ac
5
Q
quadratic formula
A
-b ± √(b2 - 4ac)]/2a
6
Q
complete the square
A
(x+b/2)^2 - (b/2)^2 + c
7
Q
angle and gradient formula
A
m = tan (θ)
θ = tan^-1 (m)
8
Q
distance formula
A
√(x2 - x1)^2 + (y2 - y1)^2
9
Q
gradient formula
A
y2 - y1/x2 - x1
10
Q
midpoint formula
A
(x2 + x1/2 , y1 + y2/2)