1.

Find AB if A = \(\begin{bmatrix}1&2\\3&4\end{bmatrix}\) and B = \(\begin{bmatrix}1&5\\3&2\end{bmatrix}\).

A. AB = \(\begin{bmatrix}15&23\\9&7\end{bmatrix}\)
B. AB = \(\begin{bmatrix}9&7\\23&15\end{bmatrix}\)
C. AB = \(\begin{bmatrix}7&9\\15&23\end{bmatrix}\)
D. AB = \(\begin{bmatrix}7&9\\23&15\end{bmatrix}\)
Answer» D.


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