expand the brackets

• Wiskunde
• Middelbare school
• havo
• Leerjaar 1

Expand the brackets

1. 

2.

3

7(3b+2c)

9ps(a+5b)

​3​​2​​abc(3+6d)

expand the brackets

at the end of the lesson you can expand the brackets in calculations with a minus symbol.

Rules for multiplication

• When multiplying two numbers  with the same signs, the answer is always positive.
  
  
• When multiplying two numbers  with different signs, the answer is always negative.

Multiplying with negative numbers

Bring out your laptop QUIETLY

expand the brackets

-5(a+3b)

try this

2b(a-3)

how about this?

-(a-3b)

and this then?

-8(x-3y)

Herleid:

11⋅9b

Herleid:

4c⋅3b

Werk de haakjes weg

−2p(3q−1)=

1. 6pq−2p
2. −6pq−2p
3. −6pq+2p
4. 6pq+2p

Werk de haakjes weg

3(k+l)

1. 3k+3l
2. 3k+l
3. 3kl
4. k+3l

SIMPLIFY
-2a(-4b+4c)

Work the brackets out
6(-2ab-3bc)

Expand the brackets

−​2​​1​​(8x−4y)

close your laptop and put in your bag

Give the answer without bracket

-(2x+8)

seatwork

Do 8.2B questions 15, 16, 17 on page 109