Question

How to find 3rd zero for a cubic polynomial when two zeroes are given?

Answer 1

Let the roots be p ,q ,r 
two root let p and q be 0 (given)
we know that => sum of roots = -b/a
=> p + q + r = -b/a
=> 0 + 0 + r = -b/a
=> r = -(b/a)