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Multiply (6 2i)(6 − 2i) a 32 b 40 c 36 12i d 36 − 12i

User Mdamia
by
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1 Answer

3 votes

Answer:

b

Explanation:

assuming you meant

(6 + 2i)(6 - 2i)

note that i² = - 1

each term in the second factor is multipied by each term in the first factor, that is

6(6 - 2i) + 2i(6 - 2i) ← distribute parenthesis

= 36 - 12i + 12i - 4i² ← collect like terms

= 36 - 4(- 1)

= 36 + 4

= 40

User Muntasir
by
8.7k points

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