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Vlad [161]
3 years ago
6

Simplify the expression (8+i)(2+7i)

Mathematics
1 answer:
Rus_ich [418]3 years ago
4 0

Given : (8 + i)(2 + 7i)

⇒ (8 × 2) + (8 × 7i) + (i × 2) + (i × 7i)

⇒ 16 + 56i + 2i + 7i²

We know that i² = -1

⇒ 16 + 58i + 7(-1)

⇒ 16 + 58i - 7

⇒ 9 + 58i

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RideAnS [48]

Answer:

3 x 4 = 12

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Step-by-step explanation:

3 + 3 + 3 + 3 = 12

3 four times equals 12

This is the same for the others

4 + 4 + 4 + 4 + 4 = 20

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4 0
3 years ago
Triangle ABC has two known angles. Angle A measures 55 degrees. Angle B measures 30 degrees. What is the measure of angle C? Sho
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Answer:

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Answer:

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Step-by-step explanation:

I would assume you want the answer step-by-step:

We can count carefully and read the question again.

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5 0
3 years ago
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