Chapter 6.5, Problem 13E

Let A = $\left[\begin{array}{cc}3& 4\\ -2& 1\\ 3& 4\end{array}\right]$, b = $\left[\begin{array}{c}11\\ -9\\ 5\end{array}\right]$, u = $\left[\begin{array}{c}5\\ -1\end{array}\right]$, and v = $\left[\begin{array}{c}5\\ -2\end{array}\right]$. Compute Au and Av, and compare them with b. Could u possibly be a least-squares solution of Ax = b? (Answer this without computing a least-squares solution.)