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2 years ago

6

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

2 answers:

olga55 [171]2 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]2 years ago

3 0

Answer: 4i

Step-by-step explanation:

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Can someone help me with this and show the work :) i’ll mark first person brainlyest

weqwewe [10]

Answer:

its probably is B. I am not sure. I wouldnt trust me though but you can if you want. ._.

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3 years ago

How to find imaginary zeros anf real zeros of F(x)=-4x^5-8x^3+12x

Fofino [41]

Answer:

$x=\{0, -1, 1, -i\sqrt{3}, i\sqrt{3}\}$

Step-by-step explanation:

We are given the function:

$f(x)=-4x^5-8x^3+12x$

And we want to finds its zeros.

Therefore:

$0=-4x^5-8x^3+12x$

Firstly, we can divide everything by -4:

$0=x^5+2x^3-3x$

Factor out an x:

$0=x(x^4+2x^2-3)$

This is in quadratic form. For simplicity, we can let:

$u=x^2$

Then by substitution:

$0=x(u^2+2u-3)$

Factor:

$0=x(u+3)(u-1)$

Substitute back:

$0=x(x^2+3)(x^2-1)$

By the Zero Product Property:

$x=0\text{ and } x^2+3=0\text{ and } x^2-1=0$

Solving for each case:

$x=0\text{ and } x=\pm\sqrt{-3}\text{ and } x=\pm\sqrt{1}$

Therefore, our real and complex zeros are:

$x=\{0, -1, 1, -i\sqrt{3}, i\sqrt{3}\}$

4 0

2 years ago

Solve for y. 3=7(1-1)<br><br>(it isn't 2)

laiz [17]

Answer:

First off, I can't solve for y, there is no y variable.

Second, 3 = 7 ( 1 - 1 ) is not true because 3 ≠ 0 ( 3 doesn't equal 0 ) :

3 = 7 ( 1 - 1 )

3 = 7 ( 0 ) ( Simplify Parenthesis )

3 = 0 ( Multiply 7 and 0 )

3 ≠ 0

4 0

3 years ago

Share $50 among Tom, Larry and Jim in the ratio 4:7:9. How much money does JIM get?

stiv31 [10]

Answer:

$22.5

Step-by-step explanation:

4x+7x+9x=50
20x=50
x=2.5

Jim gets 9*2.5= $22.5

6 0

3 years ago

Read 2 more answers

Answer this question please in short time

Andreas93 [3]

Answer:

14256

Step-by-step explanation:

6 0

3 years ago