Question

help with matrix

Answer 1

find the vector u:
\[
\left[ {\begin{array}{cc}
~~5\hspace{2mm}-5\\
-5\hspace{6mm}5
\end{array}} \right]
\left[ {\begin{array}{c}
u_1\\
u_2
\end{array}} \right]
=\left[ {\begin{array}{c}
7\\
0
\end{array}} \right]
\]
I got this: \[~~~~5(u_1-u_2)=7\\-5(u_1-u_2)=0\]

Answer 2

yes this is correct, you then need to solve the two expanded equations simultaneously to find u_1 and u_2

Answer 3

but this system says shows that u1-u2=0 on the 2nd equation, its not true on the 1st equation

Answer 4

u1-u2 cannot be 7/5 and 0 at the same time so there is no solution for this

Answer 5

alright then, thanks