MCQ
The rationalisation factor of $2+\sqrt3,$ is:
- A$2-\sqrt3$
- B$\sqrt2+3$
- C$\sqrt2-3$
- D$\sqrt3-2$
✓
Answer
- $2-\sqrt3$
Solution:
Rationalisation factor of any number like ${\text{a}}\pm\sqrt{\text{b}}$ is ${\text{a}}\mp\sqrt{\text{b}}.$
So. Rationalisation factor of $2+\sqrt3$ will be $2-\sqrt3$
Hence, correct option is (a).
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