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8-72.
  1. If f(x) = x2 + 7x − 9, calculate the values in parts (a) through (c) below. Homework Help ✎

    1. f(−3)

    2. f(i)

    3. f(−3 + i)

f(−3) = −21

f(i) = i2 + 7i − 9

f(i) = −10 + 7i

Use a generic rectangle to expand (−3 + i)2.