The Words and Symbols of This Unit
| Word | Meaning |
| Algebraic expression | a mathematical quantity built from letters and numbers |
| Term | one part of an expression, separated by a plus or a minus sign |
| Coefficient | the number multiplying the letters in a term |
| Factor | an expression that divides another exactly |
| Factorization | writing an expression as a product of its factors |
| Trinomial | an expression with three terms |
| Perfect square | an expression equal to the square of some quantity |
| Algebraic tiles | tiles that show factorization through area |
| Highest common factor, HCF | the largest shared factor |
| Lowest common multiple, LCM | the smallest expression they all divide exactly |
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