Final answer:
Without the explicit rational expression, it is impossible to determine which value of x equals zero. The solution involves rearranging the expression into the standard quadratic form and applying the quadratic formula to find the correct answer. Option A is the correct answer.
Step-by-step explanation:
To determine the value of x for which the rational expression equals zero, you would typically use the quadratic formula. The quadratic formula is given by x = (-b ± sqrt(b^2 - 4ac)) / (2a), where a, b, and c are coefficients of the quadratic equation in the form ax^2+bx+c = 0.
However, the question does not provide the explicit rational expression that we need to evaluate, making it impossible to give an accurate solution. In general, to apply the quadratic formula, the expression must be arranged into the standard quadratic form, and then the constants a, b, and c can be identified to compute the value of x.
Importantly, once the values of a, b, and c are determined, they are plugged into the quadratic formula to find the possible values of x that satisfy the equation. Depending on the values obtained, they can be compared with the options provided (a, b, c, d) to select the correct answer. In the reference information, there are examples of evaluating the quadratic equation to get two solutions for x, which often have both a positive and a negative value.
The step-by-step explanation in finding x involves identifying the coefficients a, b, and c, using the quadratic formula to solve for x, and finally comparing the solution(s) to the given options to determine the final answer.