Final answer:
The possible values for a, b, c, and d are any pair of equal values.
Step-by-step explanation:
The quadratic equations are given as x² + ax + b = 0 and x² + cx + d = 0, with d as the roots of the first equation and a and b as the roots of the second equation. To find the possible values of a, b, c, and d, we can equate the two equations:
x² + ax + b = x² + cx + d
By comparing the coefficients, we can set up a system of equations to solve for a, b, c, and d:
- a = c
- b = d
So the possible non-zero real values for a, b, c, and d are any pair of equal values.