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## Homework Statement

1) What is the coefficient of x^43 in the expansion of [(2/x^2) − x3)^16?

(2) What is the coefficient of x^14y^12 in the expansion of (3x − 2y)^26?

## Homework Equations

Binomial Expansion

## The Attempt at a Solution

For (1),

I started out like this:

(16 0) ( 2/x^2)^16 (-x^3)^0 + (16 1) (2/x^2)^15 (-x^3)^1 +....+ (16 16) (2/x^2)^0 (-x^3)^16.

Is that how we do it?

Do we do the same for (2)?