3. Which coordinates best represent all of the zeros of the graph of f(x) = x + 8x²-5x - 40?
a. (5,0); (-5,0); (-8,0)
b. (√5,0); (-8,0)
c. (√√-5, 0); (√5,0); (- 8,0)
d. (-√5,0); (√5,0); (-8,0)