# complex numbers

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Simplify the expression.

4ix2

4i2x2

-4×2

-4ix2

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Simplify the expression.

(5 – 2i) + (3 + 4i)

10i

8 + 2i

8 + 6i

2 + 2i

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Simplify the expression.

(3 – 4i) – (1 – 4i)

2 -8i

2

2 + 8i

4

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Simplify the expression

(1 – 4i)(2 + i)

4 – 8i

-2 – 7i

2 – 11i

6 – 7i

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Simplify the expression.

(-3 – i)(2 – 2i)

-8 + 4i

-4 + 4i

-6 + 6i

-6 + 2

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Simplify the expression.

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Simplify the expression.

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Simplify the expression.

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Simplify the expression.

i15

1

-1

i

-i

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Which of the following is equal to 1?

i2

i16

i21

i26