Algebra

Vocabulary

100

the name for the unknown number that is represented with a letter

variable

200

the name for a number whose value will always remain the same (no variable)

constant

300

the number in front of a variable in a variable term

EX: 5x (what is the 5 called?)

co-efficient

400

Numbers, symbols and operations (such as + and ×) grouped together that represent the value of something

expression

500

A mathematical expression that shows the value of the expression using an equal sign

equation

Simplifying

100

2x + 5x = 

7x

200

2x - 5x

-3x

300

2m·5m

10m²

400

x³·x⁵

x⁸

500

3xy-5xy+21y-5y+12xy

10xy+16y

Expanding

100

4(y+2)

4y+8

200

4(2x-5)

8x-20

300

3y(2y+1)

6y²+3y

400

-2(3w-5y)

-6w+10y

500

-x(x+x²)+x

-x²-x³+x

Factorising

100

8x+24

8(x+3)

200

32-40x

8(4-5x)

300

21xy+14x

7x(3y+2)

400

12s+60s²

12s(1+5s)

500

22x²y-55xy²

11xy(2x-5y)

Substitution

100

If a=7 and b=2 what is a+5

12

200

If c=3 calcualate 9c+10

37

300

if f=5 g=6 what is fg

30

400

If a= -2 and e= 9 calculate 2e-a

20

500

If a= -1 b= 2 c=-3 calculate abc

6