(b) \(\frac{c}a\)
Let α, β and 0 be the zeroes of ax3 + bx2 + cx + d.
Then, sum of the products of zeroes taking two at a time is given by
(αβ + β × 0 + α × 0) = \(\frac{c}a\)
⇒ αβ = \(\frac{c}a\)
∴ The product of the other two zeroes is \(\frac{c}a\).