3 years ago

Find the measure of the exterior 21. A. 15° B. 100 C. 35 D. 145

1 answer:

3 0

Answer:

The answer will be D. 145

Step-by-step explanation:

Because I said so

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devlian [24]

Answer:

The principal square root of -4 is 2i.

Step-by-step explanation:

$\sqrt{-4}$ = 2i

We have the following steps to get the answer:

Applying radical rule $\sqrt{-a} =\sqrt{-1} \sqrt{a}$

We get $\sqrt{-4} =\sqrt{-1} \sqrt{4}$

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= $\sqrt{4} i$

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