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Leni [432]
2 years ago
8

What is the soulution of x^2 + 64 = 0

Mathematics
2 answers:
Ivenika [448]2 years ago
4 0
8i.

This boils down to what is the square root of -64. Negative numbers can't be squares so an imaginary number is part of your answer.
lys-0071 [83]2 years ago
3 0
Solve out
x^2 + 64 = 0
x^2 = -64 ( we are going to use imaginary numbers to solve)
x = i \sqrt{64}
x = 8i, -8i final answers
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Which is the correct solution for the expansion 3+5^2?
alisha [4.7K]

The answer to the expansion of the expression, 3+5^2 is 28

<h3>How to expand an expansion</h3>

An expansion of an expression is the evaluation of the expression to its simplest form

Given:

3+5^2

= 3 + 5²

= 3 + (5 × 5)

= 3 + 25

= 28

Therefore, answer to the expansion of the expression, 3+5^2 is 28

Learn more about expansion:

brainly.com/question/13602562

5 0
2 years ago
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Which are factors of x2 – 4x – 5? Check all that apply.
kramer
We have been given a quadratic formula. we need to find the factors. the factors are multiplied by each other and gives rise to the quadratic formula
x² - 4x - 5
to find the factors we need to multiply x² by -5 = -5x²
then the factors of 5x² should add up to -4x. 
possible factors of 5x² are 1x and 5x. 
to get a negative product one factor should be positive and other factor should be negative. the sum of the factors is -4x, then the larger factor should be negative. 
From 1x and 5x, larger factor is 5x therefore it should be -5x.
sum of 1x and -5x is -4x.
we write -4x in the quadratic formula as (1x - 5x)
x² + 1x - 5x - 5
taking the common factors out
x (x + 1) - 5 (x + 1)
(x-5) (x+1)
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answers are 1) and 4)
5 0
3 years ago
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Select all that apply.
nekit [7.7K]

Answer:

The individuals are observed the exact way they act in real life.

Step-by-step explanation:

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In observational studies, the individuals participating in study are not manipulated or intervened or controlled in any way by the researcher.

Hence the statements best describes a characteristic of an observational study is the individuals are observed the exact way they act in real life !

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3 years ago
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MAVERICK [17]
Hi.

I believe the formula for R when you have the voltage and current is:

V/I = R

Plugging in the numbers:

220/4 = 55

The answer is the second option, 55.
6 0
3 years ago
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Alexa uses the binomial theorem to correctly expand (x + 2)^4. Which is one of the terms in Alexa's
anyanavicka [17]

Answer:

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Step-by-step explanation:

When expanded (x+2)^4= x^4+8x^3+24x^2+32x+16

The only term that matches with these is 24x^2

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