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Write the product (3 + 3i)(3 − 3i) in the form a + bi.
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3 votes
Write the product (3 + 3i)(3 − 3i) in the form a + bi.

User Lucas Nelson
by
6.9k points

1 Answer

6 votes

Answer:


\huge\boxed{18 + 0i}

Explanation:

Given expression:

= (3 + 3i)(3 - 3i)

= 3(3 - 3i) + 3i(3 - 3i)

= 9 - 9i + 9i - 9i²

= 9 - 9(-1)

∵ i² = -1

= 9 + 9

= 18

In the form a + bi:

= 18 + 0i


\rule[225]{225}{2}

User Uzun
by
7.8k points
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