Question

use matrices A and B. Compute B-A, if you can.
A= -5 4 B= -2 7 -3
-8 2 1 -6 0

Answer 1

@whpalmer4

Answer 2

they have to be the same shape to add or subtract matrices.

Answer 3

so is it not possible?

Answer 4

@whpalmer4

Answer 5

\[\left(
\begin{array}{ccc}
-2 & 7 & -3 \\
1 & -6 & 0 \\
\end{array}
\right)-\left(
\begin{array}{cc}
-5 & 4 \\
-8 & 2 \\
\end{array}
\right)\]

How would you propose to do that?

Remember, \[\left(
\begin{array}{ccc}
a & b \\
c & d \\
\end{array}
\right)-\left(
\begin{array}{cc}
e & f \\
g & h \\
\end{array}
\right)\]
is just another way of writing\[a-e\]\[b-f\]\[c-g\]\[d-h\]What would we do with the extra (or missing, depending on how you look at it) numbers?

Answer 6

so not possible correct?

Answer 7

Yes, not possible, unless you invent some mathematics to make it possible.