Rationalise 2 3 5 5- 3 - JAMB Mathematics 2010 Question
| Rationalise | 2√3+√5 |
| √5-√3 |
A
(3 √ 15 +11) / 2
B
3 √ 15 -11
C
(3 √ 15 -11) / 2
D
3 √ 15 +11
correct option: a
| 2√3+√5 |
| √5-√3 |
| = | 2√+√5 |
| |||
| √5-√3 |
| = | 2√3(√5+√3)+ √5(√5+√3) |
| ____(√5)2-(√3)2 |
| = | 2√15+2(3) +5+√15 |
| _____5 - 3 |
| = | 2√15+6+5+√15 |
| ______2 |
| = | 11+3√15 |
| ___2 |
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