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Jumlah nilai $k$ yang memenuhi persamaan $\\begin{bmatrix} 2 & 2 & k \\end{bmatrix}\\begin{bmatrix} 1 & 2 & 0 \\\\ 2 & 0 & 3 \\\\ 0 & 3 & 1 \\end{bmatrix}\\begin{bmatrix} 2 \\\\ 2 \\\\ k \\end{bmatrix} = \\simplify{-k^2+{a}k+{b}}$ adalah $\\ldots$.

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