# An algebra problem by Brilliant Member

Algebra Level 2

If $$A = \begin{pmatrix} 3 & 11 & 6 \\ -2 & 7 & 5 \\ 9 & -1 & -3 \\ 1 & 0 & 2 \end{pmatrix}$$ and $$B = \begin{pmatrix} 1 & -4 \\ 3 & 2 \\ 5 & 9 \end{pmatrix}$$ , find $$AB$$.

Note:

If your answer is $$AB = \begin{pmatrix} a & b \\ c & d \\ e & f \\ g & h \end{pmatrix}$$, give your answer as $$a+b+c+d+e+f+g+h$$.

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