Question

If a, b are the real roots of x² + px + 1 = 0 and c, d are the real roots of x² + qx + 1 = 0, then (a – c) (b – c) (a + d) (b + d) is divisible by

a. a – b – c – d

b. a + b + c – d

c. a + b + c + d

d. a + b – c – d

Answer 1

Correct option are c. & d.