Find the derivative of with respect to :
There are many ways to do this problem but here we will use it to illustrate the product rule on three terms.
Another way you can try this is to use the product rule for two terms and take and . Then, when computing the derivative of you'll have to use the product rule again but the answer will be the same either way.
A third way to do the problem is to multiply the polynomial out and then take the derivative using the product rule.