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natali 33 [55]
4 years ago
5

PLEASE HELP ASAP 25 PTS + BRAINLIEST TO RIGHT/BEST ANSWER

Mathematics
1 answer:
dolphi86 [110]4 years ago
8 0

Answer:

1-7i

Step-by-step explanation:

Multiply the parenthesis

-3-4i-3i-4i²

By Definition i²=-1

-3-4i-3i-4 x (-1)

Any expression multiplied by -1 equals its opposite

-3-4i-3i+4

Calculate the sum

1-4i-3i

Collect like terms

1-7i

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So, we can write:

(14.5)^{2}=10^{2}+OA^{2} \\  \\ 
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Thus, the measure of OA = 10.5

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