math help!!simplify

Question

simplify.

a. √ 20 + √ 5

b. 5√(12)-2√27

c. √ 3 (√(6)+2√5)

d. 24√18 0ver 8√2

Answer 1

a)

This can be written as 

Hence the value of   is  

Answer 2

b)

This can be written as 

Hence the value of    is  

Answer 3

c )

This can be written as 

Hence the  value of     is    

Answer 4

d)

This can be written as 

 24  is written as (8 * 3)

Cancelling  common terms in numerator and denominator .

= 3 * 3 = 9 .

Hence the value of   is  9.