Question

V4
(ii)
7. Simplify the following by rationalisation
of denominator :
7.
(i)
15
5
(iii)
27
6
(v)
4-V10
3
(vii)
√7-2
(iv)
2
313
V2
5
1
215-13
(vi)
(viii)
1
√6-√3​

Answer 1

Answer:

.

Step-by-step explanation:

When the product of two surds is a rational number, then each of the two surds is called rationalizing factor of the other.

For example, 5√2√ is a surd where 5–√ is numerator and 2–√ is denominator. Now for rationalization of surds, if we multiply both numerator and denominator by 2–√, then denominator will be a rational number.

5√2√ = 5√×2√2√×2√

= 10√2