Question

Use the Binomial Theorem to expand the binomial. (d – 4b)3

Answer 1

Can you solve this one?
\[\sum_{k=0}^{3} \left(\begin{matrix}3 \\ k\end{matrix}\right) d ^{3-k}(-4b) ^{k}\]

Answer 2

no im not good at math

Answer 3

Do you know what mean by \[\sum_{k=0}^{3}" number"\]

Answer 4

The expantion of the first thing i wrote is
\[=\left(\begin{matrix}3 \\ 0\end{matrix}\right) d ^{3}+\left(\begin{matrix}3 \\ 1\end{matrix}\right)d ^{2}(-4b)^{1}+\left(\begin{matrix}3 \\ 2\end{matrix}\right)d ^{1}(-4b)^{2}+\left(\begin{matrix}3 \\ 3\end{matrix}\right)(-4b)^{3}\]

If you don't get the idea of that you should probably go back a few pages in your book and reveiw it