This key facts covers Key Rules to Remember within Simplifying Expressions for GCSE Mathematics. Revise Simplifying Expressions in Algebra for GCSE Mathematics with 11 exam-style questions and 5 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 10 of 18 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 10 of 18
Practice
11 questions
Recall
5 flashcards
Key Rules to Remember
| Expression | Meaning | If x = 3 |
|---|---|---|
| 2x | 2 × x | 2 × 3 = 6 |
| x² | x × x | 3 × 3 = 9 |
| x³ | x × x × x | 3 × 3 × 3 = 27 |
| 2x² | 2 × (x × x) | 2 × 9 = 18 |
| xy | x × y | If y = 4: 3 × 4 = 12 |