Question

simplify: sqrt 4/5

a) 2 sqrt (5)
b) 2
c) 2 sqrt (5) / 5
d) sqrt (5)

Answer 1

You must mean
√(4/5) since none of the answers match your question.

√(4/5)
=√4/√5
= 2/√5 * √5/√5
= 2√5/5 , which looks like c)

Answer 2

√(4/5) = 2√(1/5)

I don't know what your parentheses mean.