What is the second term in the binomial expansion of (2r – 3s)12?

The second term uses one factor of −3s and eleven factors of 2r. Its coefficient is 12 × 2¹¹ × (−3) = 12 × 2,048 × (−3) = −73,728, and its variables are r¹¹s. So the second term is −73,728r¹¹s, choice A.

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