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3 years ago

6

20 points What is the square root of -16? -8i -4i 4i 8i

2 answers:

olga55 [171]3 years ago

8 0

Answer:

4i

Step-by-step explanation:

Negative numbers don't have real square roots since a square is either positive or 0. The square roots of numbers that are not a perfect square are members of the irrational numbers. This means that they can't be written as the quotient of two integers. So you have to use the "imaginary number", i.

Finger [1]3 years ago

3 0

Answer: 4i

Step-by-step explanation:

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Oksana_A [137]

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5 0

3 years ago

Find the length of BC.

STatiana [176]

Answer:

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3 years ago

Finding the geometric mean

grigory [225]

Answer:

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Step-by-step explanation:

4 0

2 years ago

Which of the following is a solution of x2 − 10x = −36? (6 points)

Softa [21]

Answer:

D

Step-by-step explanation:

Given

x² - 10x = - 36

Solve using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 5)x + 25 = - 36 + 25

(x - 5)² = - 11 ( take the square root of both sides )

x - 5 = ± $\sqrt{-11}$ ( add 5 to both sides )

x = 5 ± i $\sqrt{11}$

Thus

x = 5 - i $\sqrt11}$ or x = 5 + i $\sqrt{11}$

6 0

4 years ago

A cylinder of volume 10pi with a circular bottom and no top is constructed out of two different matierials. the cost of the bott

Elena L [17]

Answer? i need help too

6 0

3 years ago