2√3 + √3 is equal to
(a) 2√6
(b) 6
(c) 3√3
(d) 4√6
Solution:
2√3 + √3
= 3√3 option (c) is correct
The value of √8 + √18 is
(a) √26
(b) 2 (√2 + √3)
(c) 5√2
(d) 6√2
Solution:
(c) 5√2 is correct
Hint : √8 + √18
= √2 ×√4 + √2 × √9
= √2 (2+3)
= 5√2
More Solutions:
- Express the following numbers in the form p/q.
- Classify the following numbers as rational or irrational:
- what can you say about the prime factors of q?
- Insert an irrational number between the following.
- Insert two irrational numbers between 2 and 3.
- Find one rational number between √2 and √3.
- Insert irrational numbers between √5 and √7.
- Simplify the following: (i) √45 – 3√20 + 4√5
- Simplify the following: (i) (5 + √7) (2 + √5).