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