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Sixth Class maths · N.4 · Equivalent Expressions

Distribute a negative or subtraction across parentheses

A minus sign in front of brackets changes the sign of every term inside. Expand first, then combine if you can.

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  1. Expand: −3(3a − 4)

    Answer: −9a + 12

  2. Expand: −(x + 2)

    Answer: −x − 2

  3. Expand: −(3p + 3)

    Answer: −3p − 3

Tip: A minus sign in front of brackets changes the sign of every term inside. Expand first, then combine if you can.

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