GCSE Secondary Maths Age 13-17 - Algebra: Multiplying Out Brackets - Explained

The video tutorial explains how to expand algebraic brackets by multiplying each term inside the bracket by the number outside. It demonstrates expanding both positive and negative terms and then simplifies the expression by combining like terms. The tutorial also discusses the marks allocation for correctly expanding and simplifying the expression.

What does it mean to expand a bracket in algebra?

• To subtract the number outside from each term inside the bracket.

• To multiply each term inside the bracket by the number outside.

• To divide each term inside the bracket by the number outside.

• To add all the terms inside the bracket.

When expanding the expression 5(P + 3), what is the result?

• 5P - 15

• 5P + 15

• 5P + 3

• 5P + 3P

How do you handle a negative number outside the bracket when expanding?

• Multiply normally and keep the negative sign.

• Ignore the negative sign.

• Add the negative sign to each term inside the bracket.

• Change the negative sign to positive.

What is the simplified form of the expression 5P + 4P + 15 - 2?

• 5P + 4P + 17

• 5P + 4P + 13

• 9P + 17

• 9P + 13

How many marks were allocated for correctly expanding and simplifying the expression?

• One mark for expanding, one mark for simplifying.

• One mark for simplifying only.

• Two marks for expanding only.

• Two marks for simplifying only.