rewrite the fraction by rationalizing the denominator.

Question

2/4+√5x

Answer 1

2/(4+xsqr5)

= (8 -2xsqr5)/(16-5x^2)

multiply numerator and denominator by the conjugate, 4-xsqr5

UNLESS the problem was

2/(4+sqr(5x), then

= (8-2sqr(5x))/(16-5x)

or

maybe you really did mean

2/4 + sqr5x

but then there's no denominator that needs rationalizing