Summary (Grade 10 NSC Matric Mathematics): Flashcards

{1, 2, 3, 4, ...} - counting numbers

{0, 1, 2, 3, 4, ...} - natural numbers + zero

{..., -3, -2, -1, 0, 1, 2, 3, ...} - all whole numbers

Number as $\frac{a}{b}$, $a$, $b$ integers, $b \neq 0$

Cannot be written as fraction; decimal doesn't terminate/repeat

$n^{th}$ root that can't simplify to rational (e.g., $\sqrt{2}$)

Algebraic expression with exactly two terms

$(x + y)(x^2 - xy + y^2)$

$(x - y)(x^2 + xy + y^2)$

Only factors cancel, never individual terms