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Can u help solve problem

User IgorZ
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1 Answer

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To multiply the matixes, we'll look at their elements


A=\begin{bmatrix}{A_1} & {A_2} & {A_3} \\ {} & {} & {} \\ {} & {} & \end{bmatrix},\text{ B=}\begin{bmatrix}{B_1} & {} & {} \\ {B_2} & {} & \\ {B_3} & {} & {}\end{bmatrix}

In order to get AB, we simply use the following formula


AB=A_1\cdot B_1+A_2\cdot B_2+A_3\cdot B_3

In this case


AB=3\cdot1+4\cdot2+5\cdot3+6\cdot4=3+8+15+24=50

Since both matrixes have 4 elements. Thus


AB=50

User Mghicks
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