Symbols in Algebra
Common Symbols Used in Algebra
Symbols save time and space when writing. Here are the most common algebraic symbols:
Symbol | Meaning | Example |
---|---|---|
+ | add | 3+7 = 10 |
- | subtract | 5-2 = 3 |
× | multiply | 4×3 = 12 |
multiply (so "×" does not look like "x") | 4·3 = 12 | |
/ | divide | 20/5 = 4 |
square root ("radical") | √4 = 2 | |
cube root | ||
nth root | ||
( ) | grouping symbols (round brackets) | 2(a-3) |
[ ] | grouping symbols (square brackets) | 2[ a-3(b+c) ] |
{ } | set symbols (curly brackets) | {1,2,3} |
= | equals | 1+1 = 2 |
approximately equal to | π 3.14 | |
≠ | not equal to | π ≠ 2 |
< ≤ | less than, less than or equal to | 2 < 3 |
> ≥ | greater than, greater than or equal to | 5 > 1 |
implies (if ... then) | a and b are odda+b is even | |
"if and only if" or iff or "is equivalent to" | x=y+1y=x−1 | |
Therefore | a=b b=a | |
! | Factorial | 4! = 4×3×2×1 = 24 |