Definitions

Question 1

Deinition:
Roots

Answer 1

The roots are the solutions to a quadratic equation

also where the graph crosses the x axis

Question 2

Definition:
Quadratic Equation

Answer 2

An equations where the highest power of x is 2 (x squared)

Question 3

Command word:
Rearrange

Answer 3

Rewrite the equation with a new subject

Question 4

Command word:
Change the subject

Answer 4

Rewrite the equation with a new subject

Question 5

Command word:
Solve

Answer 5

Find the value of the variable (unkown/letter)

usually x

Question 6

Command word:
Factorise

Answer 6

Take out a factor from all terms and place into brackets

Question 7

Definition:
Equation

Answer 7

A combination of numbers, letter, operators and an equal sign

Question 8

Definition:
Expression

Answer 8

A combination of number, letters and operations

3x+3, x-5, t, 8+9

Question 9

Definition:
Factors

Answer 9

Numbers you can divide by

Factors of 12 include:
1,2,3,4,6,12

Question 10

Definition:
Square root

Answer 10

Inverse of a square

Question 11

Command word:
Expand

Answer 11

To multiply out brackets

Question 12

Definition:
Surds

Answer 12

Square roots with no integer (whole number) answer

Question 13

Command word:
Simplify

Answer 13

To rewrite answer using smaller numbers or less information

Question 14

Process:
Complete the square

Answer 14

A method of solving quadratic equations that requires you to rewrite the expression a certain way

Question 15

Process:
Quadratic Formula

Answer 15

An equation used to solve quadratic equations

Question 16

Command word:
Substitute

Answer 16

To replace one thing with another, often to swap a letter with a number

Question 17

Definition:
Simultaneous Equations

Answer 17

Generally two equations, both with two variable. Are solved togther.

Question 18

Definition:
Variable

Answer 18

An unknown value, we use a letter to show this

Question 19

Definition:
Linear equation

Answer 19

An equation where the highest power of x is 1 (so just x)

Question 20

Definition:
Inequality

Answer 20

A relation between two expression that is not equal, one is bigger/smaller then the other

Question 21

Process:
Set Notation

Answer 21

Is a way of writing all possible answers together, often between curly bracket { … }