# How do you use the binomial formula to find the coefficient of the #z^19 q^2# term in the expansion of #(z+2q)^21#?

##### 1 Answer

Jan 19, 2016

#### Explanation:

The coefficient will be the second term in the twenty-first row of Pascal's triangle (excluding the inside and outside ones).

This can be represented as

Algebraically represented, this is

#(21!)/((2!)(19!))=(21xx20)/2=210#