Quadratic equations/ simultaneous equations/ household finance Flashcards
(10 cards)
1
Q
What is SPF?
A
sum product factor method, used to factorise and solve quadratic equations.
2
Q
How to factorise quadratics?
A
Bracket bracket, eg: x^2+5x+6= (x+2)(x+3)
3
Q
How to solve quadratics?
A
Finding x, normally 2 options, depending on the context, we can sometimes determine which one is x. Eg: x^2+5x+6 = x= -2 or x= -3
4
Q
What are 2 methods to solve simultaneous equations?
A
Elimination and substitution.
5
Q
What is the goal for simultaneous equations?
A
Finding BOTH x AND y.
6
Q
How to calculate budget?
A
Income - expenses
7
Q
How to calculate profit?
A
Selling price - cost price
8
Q
Loss formula
A
Cost price - selling price
9
Q
Profit %
A
(Profit/cost price) x 100
10
Q
Loss %
A
(Loss/cost price) x 100
