# If two of the zeros of the cubic polynomial ax^(3)+bx^(2)+cx+d are 0 then the third zero is

117 views

closed
If two of the zeros of the cubic polynomial ax^(3)+bx^(2)+cx+d are 0 then the third zero is
A. (-b)/a
B. b/a
C. c/a
D. (-d)/a

+1 vote
by (71.6k points)
selected by

Let  alpha, 0, 0 be the zeros of ax^(3) + bx^(2) + cx + d. Then,
sum of zeros = (-b)/a rArr alpha+0+0=(-b)/a rArr alpha = (-b)/a.
Hence, the third zeros is (-b)/a.