1. 3(5) = 15
3(2x) = 6x
When we write a number in front of a bracket, the missing operator is multiplication. Here we are saying 3 times 5, or 3 lots of 5. The middle one is saying 3 lots of 2x, or we can think of it as 2x, 3 times, or 2x + 2x + 2x. What does the 3rd bracket mean? Read it to me.
3(2 + x2) = ?

2. 2(x + 1) = ?
5(2x + 3) = ?
4(2x2 + 4) = ?

3. 2(x - 1) = ?
5(-2x - 3) = ?
We can think of this subtraction of 1, as the same as So we have 2 lots of x and 2 lots of -1. Which is 2x + -2, or 2x -2.

4. -(5) = -5
-(-5) = ?
The negative of an expression means everything gets inverted
-(-3x) = ?

5. -(x + 1) = ?
-(3 - 2x) = ?
The negative of an expression means everything gets inverted
-(-x - 4) = ?

6. 2(x + 1)
5(2x + 3)
6(x - 4)
-(2x + 4)
a(2 + x)
F) -(3x - 1)
G) -4(x - 3)
H) 5(-1 + x2)
3(6 – 2x)
J) x(2x - 4)

7. F) -(3x - 1) = -3x + 1
G) -4(x - 3) = -4x + 12
H) 5(-1 + x2) = x2
3(6 – 2x) = 18 – 6x
J) x(2x - 4) = 2x2 - 4x
2(x + 1) = 2x + 2
5(2x + 3) = 10x + 15
6(x - 4) = 6x - 24
-(2x + 4) = -2x - 4
a(2 + x) = 2a + ax

8. 10 - 2(x + 1)
3(x2 + x) - (2x - 4)

9. 2(3x - 5) - (5 – 2x)
3(4x – (2 – x))