Definitions Flashcards
Deinition:
Roots
The roots are the solutions to a quadratic equation
also where the graph crosses the x axis
Definition:
Quadratic Equation
An equations where the highest power of x is 2 (x squared)
Command word:
Rearrange
Rewrite the equation with a new subject
Command word:
Change the subject
Rewrite the equation with a new subject
Command word:
Solve
Find the value of the variable (unkown/letter)
usually x
Command word:
Factorise
Take out a factor from all terms and place into brackets
Definition:
Equation
A combination of numbers, letter, operators and an equal sign
Definition:
Expression
A combination of number, letters and operations
3x+3, x-5, t, 8+9
Definition:
Factors
Numbers you can divide by
Factors of 12 include:
1,2,3,4,6,12
Definition:
Square root
Inverse of a square
Command word:
Expand
To multiply out brackets
Definition:
Surds
Square roots with no integer (whole number) answer
Command word:
Simplify
To rewrite answer using smaller numbers or less information
Process:
Complete the square
A method of solving quadratic equations that requires you to rewrite the expression a certain way
Process:
Quadratic Formula
An equation used to solve quadratic equations
Command word:
Substitute
To replace one thing with another, often to swap a letter with a number
Definition:
Simultaneous Equations
Generally two equations, both with two variable. Are solved togther.
Definition:
Variable
An unknown value, we use a letter to show this
Definition:
Linear equation
An equation where the highest power of x is 1 (so just x)
Definition:
Inequality
A relation between two expression that is not equal, one is bigger/smaller then the other
Process:
Set Notation
Is a way of writing all possible answers together, often between curly bracket { … }
