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In this section, we have given you algebra symbols, some rules to solve the expression. These rules are PEMDAS or BODMAS.The symbols are commonly used in word problems. |
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1) x | x variable | Unknown Value to find. | 3x = 6, then x = 2 |
2) ≡ | Equivalence | Identical to | 3 ≡ 3 |
3) ≈ | Approximately Equal | Approximation | sin(0.02) ≈ (0.02) |
4) ∝ | Proportional to. | Proportional to. | f(x) ∝ g(x) |
5) ∞ | Lemniscate | Infinity Symbol. | |
6) ≠ | Not equal. | Inequality | 5 ≠ 3 |
7) ≤ | Inequality | Less than or Equal to. | x + 5 ≤8 ⇒ x ≤ 3 |
8) ≥ | Inequality | Greater than or Equal to. | x - 3 ≥ 10 ⇒ x ≥ 13 |
9) ( ) | parentheses | calculate expression inside first | 2 ∗ (3+5) = 16 |
10) [ ] | brackets | calculate expression inside first | [(1+2)∗(1+5)] = 18 |
11) ⇒ | Implies | Used to write a conclusion | 2x=8 ⇒ x = 4 |
12) ∴ | Therefore | Used to write a conclusion | 5x=5 ∴ x = 1 |
For US students | For Indian students and UK students |
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P ---> Parenthesis { } E ---> Exponents M ----> Multiplication (x) D ---> Division (÷) A ---> Addition (+) S ---> Subtraction (-) |
B ---> Bracket { } O ---> Of (x) D ----> Division (÷) M ---> Multiplication (x) A ---> Addition (+) S ---> Subtraction (-) |
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