How do you use the binomial series to expand  (x - 2x) ^15 ?

Aug 21, 2017

$- {x}^{15}$

Explanation:

We have: ${\left(x - 2 x\right)}^{15}$

The binomial series is not required to expand this expression.

Let's simplify the variables within the parentheses:

$= {\left(- x\right)}^{15}$

$= - {x}^{15}$