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12-22.
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    1. (a + b)3

    2. (2m + 5)3

Review the Math Notes on the Binomial Theorem in lesson 10.3.1. Remember, you can also use Pascal's Triangle to help you here.

(a + b)3 = 3C3a3b0 + 3C2a2b1 + 3C1a1b2 + 3C0a0b3

a3 + 3a2b + 3ab2 + b3

Use the result of part (a). a = 2m; b = 5. Simplify.