Question

Ifthe sum of the two zeroes of cubic polynomial x^3 + 6x^2 +Cx + d is 2, find its third zero.​

Answer 1

Formula used:

Cubic Polynomial = x³ - (sum of zeroes)x² + (sum of zeroes taken two at a time)x - product of zeroes

If the zeroes are taken to be = a, b, c

Cubic Polynomial = x³ - (a + b + c)x² + (ab + bc + ca)x - (abc)

For full solution, refer the attachment.