Answer:
15i + 6
Step-by-step explanation:
Multiply. Note that:
i * i = i² = -1
Use the FOIL method.
Distribute 3i to all terms within the first parenthesis:
5 * 3i = 15i
-2i * 3i = -6i² = -6 * -1 = 6
15i + 6 is your answer.
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