Simplify the expression to a + bi form: (-12-3i)(-12-3i)

asked Jan 16, 2023 127k views

5 votes

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10 votes

Answer:

(-12-3i)(-12-3i)=135+72i

Explanation:

$(-12-3i)(-12-3i)\\\\(-12)(-12)+(-12)(-3i)+(-3i)(-12)+(-3i)(-3i)\\\\144+36i+36i+9i^2\\\\144+72i+9(-1)\\\\144+72i-9\\\\135+72i$

Meteorite answered Jan 20, 2023

3.4k points

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