मान लीजिए $A=\left[\begin{array}{ll} 2 & 4 \\ 3 & 2 \end{array}\right], $ $B=\left[\begin{array}{cc} 1 & 3 \\ -2 & 5 \end{array}\right], $ $C=\left[\begin{array}{cc} -2 & 5 \\ 3 & 4 \end{array}\right] $, तो AB ज्ञात कीजिए।
Exercise-3.2-1(4)
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AB = $\left[\begin{array}{ll} 2 & 4 \\ 3 & 2 \end{array}\right]\left[\begin{array}{cc} 1 & 3 \\ -2 & 5 \end{array}\right]$ = $\left[\begin{array}{cc} 2 \times 1+4 \times(-2) & 2 \times 3+4 \times 5 \\ 3 \times 1+2 \times(-2) & 3 \times 3+2 \times 5 \end{array}\right]$= $\left[\begin{array}{cc} -6 & 26 \\ -1 & 19 \end{array}\right]$
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