If 1and -2 are two zeroes of the quadratic polynomial p(x)= 2x^3-x^2-5x-2 find its third zero

If 1and -2 are two zeroes of the quadratic polynomial p(x)= 2x^3-x^2-5

1.	If 1and -2 are two zeroes of the quadratic polynomial p(x)= 2x^3-x^2-5x-2 find its third zero
Answer» Its 1/2 Sorry wrong ans 1