Find the constant term (term independent of x) in the expansion of (x - 2/x^2)^15

Question

Find the constant term (term independent of x) in the expansion of 

(x - \(\frac2{x^2}\))¹⁵

Answer 1

Here, a = x, b = -2/x², n = 15

We have t_r+1 = ⁿC_ra^n-rb^r

To get the term independent of x, we must have

 = -96096