Question

Linear algebra,

Can you please help me solve the problem below,

https://www.dropbox.com/s/xce9cxer1pq7k5k/Screenshot%202016-02-21%2017.09.40.png?dl=0

Answer 1

How could you possibly stuck on this problem ?

Answer 2

Simply plugin the given 3 points
You get 3 equations
solve them

Answer 3

It is literally\[
\begin{align*}
p(1)&=-5\\
p(-1)&=1\\
p(2)&=7
\end{align*}
\]

Answer 4

http://prntscr.com/a65090