Question

A). 2/√20 b). 3/√18 c). 2a/3√a d). xy/√x+√y

Answer 1

A) 2/√20
= 2/2√5
= (1/5)√5

B) 3/√18
= 3/3√2
= (1/2)√2

C) 2a/3√a = 2a/3√a x √a/√a
= (2/3)a√a

D) xy/(√x + √y) * (√x - √y)/(√x - √y)
= xy(√x - √y)/(x - y)