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Algebra 2 Properties
Ch.1 Properties
| Question | Answer |
|---|---|
| Definition of Subtraction | a - b = a + (-b) |
| Definition of Division | a ÷ b = a/b = a ∙ 1/b, b≠0 |
| Distributive Property for Subtraction | a(b - c) = ab - ac |
| Multiplication by 0 | 0 ∙ a = -a |
| Multiplication by -1 | -1 ∙ a = -a |
| Opposite of a Sum | -(a + b) = -a + (-b) |
| Opposite of a Difference | -(a -b) = b-a |
| Opposite of a Product | -(ab) = -a ∙ b = a ∙(-b) |
| Opposite of an Opposite | -(-a) = a |
| Reflexive Property of Equality | a = a |
| Symmetric Property of Equality | If a = b, then b = a |
| Transitive Property of Equality | If a = b and b = c, then a = c |
| Addition Property of Equality | If a = b, then a + c = b + c |
| Subtraction Property of Equality | If a = b, then a - c = b - c |
| Multiplication Property of Equality | If a = b, then ac = bc |
| Division Property of Equality | If a = b and c ≠ 0, then a/c = b/c |
| Substitution Property of Equality | If a = b, then b may be substituted for a in any expression to obtain an equivalent expression |
| Transitive Property of Inequality | If a ≤ b and b ≤ c, then a ≤ c |
| Addition Property of Inequality | If a ≤ b, then a + c ≤ b + c |
| Subtraction Property of Inequality | If a ≤ b, then a - c ≤ b - c |
| Multiplication Property of Inequality | If a ≤ b and c > 0, then ac ≤ bc. If a ≤ b and c < 0, then ac ≥ bc. |
| Division Property of Inequality | If a ≤ b and c > 0, then a/c ≤ b/c. If a ≤ b and c < 0, then a/c ≥ b/c. |
| Closure of Addition | a + b is a real number |
| Closure of Multiplication | ab is a real number |
| Communtative of Addition | a + b = b + a |
| Communtative of Multiplication | ab = ba |
| Associative of Addition | (a + b) + c = a + (b +c) |
| Associative of Multiplication | (ab)c = a(bc)` |
| Identity of Addition | a + 0 = a, 0 + a = a |
| Identity of Multiplication | a ∙ 1 = a, 1∙ a = a |
| Inverse of Addition | a + (-a) = 0 |
| Inverse of Multiplication | a ∙ 1/a = 1, a ≠ 0 |
| Distributive | a(b + c) = ab + ac |