985942
Description
Flashcards by Elliot O'Leary, updated more than 1 year ago
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Created by Elliot O'Leary
about 10 years ago
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| Question | Answer |
| What are surds? | surds are numerical expressions that contain square roots |
| Rule for MULTIPLYING surds? | √a x √b = √ab AND C√a x D√b = CD√ab |
| Rule for DIVIDING surds? | √a ÷ √b = √a/b AND C√a ÷ D√b = C/D√a/b |
| SIMPLIFYING surds rules? | √20 = √4x5 = 2√5 √20 + √45 = 2√5 + 3√5 = 5√5 |
| Rationalise the denominator of 2/√5 | Multiply the top and bottom by √5: 2 x √5/√5 x √5 = 2√5/5 |
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