Answer:
91 - 60i
Explanation:
(-10 + 3i)² = (-10)² + (2 * -10 * 3i) + (3i)²
= 100 - 60i + 9i²
= 100 - 60i - 9
= 91 - 60i
In the form of a + bi, the answer is 91 - 60i.
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