Find two rational expressions whose difference is equal to -.

Can somebody explain how to solve it?

We have the following expression:

- (x + 4) / (4x)

We must find two rational expressions.

For this we have, generically:

(a / b) - (c / d)

Doing the subtraction of fractions we have:

(a * d - c * b) / (b * d)

(-x - 4) / (4x)

Rewriting:

- (x + 4) / (4x)

Thus,

(-1/4) - (1 / x)

Answer:

two rational expressions whose difference is equal to - (x + 4) / (4x) are:

(-1/4) - (1 / x)