If one of the zeroes of cubic polynomial x3 + ax2 + bx + c is - 1 then the product of the other two zeroes is -----

To find the product of the other two zeroes of the cubic polynomial, we can use Vieta's formulas. Vieta's formulas relate the coefficients of a polynomial to the roots of the polynomial.

In this case, let's assume the three zeroes of the cubic polynomial are -1, r, and s.

According to Vieta's formulas, the sum of the zeroes of a cubic polynomial is given by:

Sum of zeroes = (-1) + r + s = -a

Since one of the roots is -1, we have:

-1 + r + s = -a

Similarly, the product of the zeroes is given by:

Product of zeroes = (-1)(r)(s) = -c

Since we are looking for the product of the other two zeroes, we can express the product of the zeroes as:

(-1)(r)(s) = -c

Now, substituting the given values, we have:

(-1)(-1)(r)(s) = -c

(r)(s) = -c

Hence, the product of the other two zeroes of the cubic polynomial is -c.

If the three roots are r,s,t then their product rst = c/a. So, if r = -1, then st = = c/r = c/-1 = -c.