Spread the number outside the parentheses, then combine matching terms.
Read this first — it covers the idea in plain language with a worked example.
To remove parentheses, multiply the number outside by every term inside. For example, 3(x + 4) = 3·x + 3·4 = 3x + 12.
Like terms have the exact same variable part. You can add or subtract their coefficients (the numbers in front). Constants combine with constants.
Simplify 2x + 4 + 3x − 1.
Watch out
5x and 5 are NOT like terms — one has a variable and one does not.
Watch the main video, then check the second take if you want another explanation.
Add or subtract terms that share the same variable part.
Watch on YouTubeTry a worksheet or work through some problems before the quiz.
A couple of questions to make sure this topic stuck. Retake as many times as you want.
Distributive Property & Like Terms
Which expression is equivalent to 3(x + 4)?
