Question

guys as this is a Cubic polynomial we need Alpha ,beta and gamma(3 of them) but Only two zeroes got verified so we will take alpha as 1/2 and beta as -2 but what about gamma?​

Answer 1

You calculate the sum of zeroes and find gama by taking it as x or any other variable. (I used it as gama only)

Then you get the value of gama. You can then verify it as a zero and find the relation of zeroes with coefficients.