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)
