In algebra, when we multiply out brackets, everything inside the bracket gets multiplied by whatever is outside the bracket.
Take care with the signs, remembering the rules about multiplying negative numbers:
When multiplying or dividing numbers, if the signs are the same (+ and + or - and -) the answer is positive (+)
If the signs are different (+ and - or - and +) the answer is negative (-)
The following examples show how the 3 and the -3 outside the brackets affect the terms inside the brackets.
Can you see how important it is to look carefully at the signs?!
Let's get started.
View the activity introduction for more information on the topic
Read the question aloud
Open the accessibility toolbar to change fonts and contrast, choose a different language, use a ruler and more
Question
Do you want to skip questions and finish?
Hold up, it looks like there may be an issue with your spelling. Why not try it again?
You need to check your answer before you proceed. Are you sure you want to skip?
Teacher explanation