• Remember to multiply all the terms inside the bracket by the term immediately in front of the bracket.

• If there is no term in front of the bracket, multiply by 1 or -1.

For I/GCSE Mathematics, you may try out the following questions below!

1. 3(a - 4) = 3a - 12

2. 6(2c + 5) = 12c + 30

3. - (4a + 2) = -4a - 2

4. 8 - 2(t + 5) = -2t - 2

5. 2p(3p + 2) - 5(2p - 1) = 6p² - 6p + 5

If you have any question, you can

• Split the double brackets into 2 single brackets and then expand each bracket and simplify.

• If a single bracket is squared [e.g. (a + 5)²] change it into double brackets (a + 5)(a + 5).

For I/GCSE Mathematics, you may try out the following questions below!

1. (c + 2)(c + 6) = c² + 8c + 12

2. (3a – 4)(5a + 7) = 15a² + a – 28

3. (p + 2)(7p – 3) = 7p² + 11p – 6

4. (c + 7)² = c² + 14c + 49

5. (4g – 1)² = 16g² – 8g + 1

That's the end!

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