To expand the expression \(-56(9b - 12)\), we will distribute \(-56\) to both terms inside the parentheses.
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Distributing \(-56\) to \(9b\): \[ -56 \cdot 9b = -504b \]
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Distributing \(-56\) to \(-12\): \[ -56 \cdot -12 = 672 \]
Now, combining these results, the expanded expression is: \[ -504b + 672 \]
So, the completed expanded expression is: \[ -504b + 672 \]