To expand the expression \(-56(9b - 12)\), you need to distribute \(-56\) to both terms inside the parentheses.
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Distribute \(-56\) to \(9b\): \[-56 \times 9b = -504b\]
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Distribute \(-56\) to \(-12\): \[-56 \times -12 = 672\]
Now, combine these results:
\[ -56(9b - 12) = -504b + 672 \]
So, the expanded expression is:
\[ -504b + 672 \]