Which of the following is a solution of x^2 + 2x + 8?

Mathematics

1 answer:

denis-greek [22]4 years ago

4 0

X^2 + 2x + 8 = 0

(x + 1)^2 - 1 + 8 = 0

(x + 1)^2 = -7

x + 1 = sqrt (-7) = i sqrt7

x = -1 + i sqrt7

Its B

You might be interested in

The attendance office creates a bar graph to display the number of students tardy throughout the month. What is the range of the

aliina [53]

Answer:

Step-by-step explanation:

To find the range you subtract the highest and lowest value

The highest value on this graph is 105 from the month of May and the lowest value is 45 from the month of March.

When you do 105-45 you get 60 which is the range

5 0

3 years ago

Using a dollar even though it has a tear is an example of<br> which characteristic of money?*

Andreyy89

Answer:

Durability

Step-by-step explanation:

Durability in money is when objects used as money can withstand being worn out or torn. In this case, the bill is still used though it has a tear therefore it's an example of durability.

Hope it helps :)

4 0

3 years ago

Using sum or difference formulas, find the exact value of sin(165∘)

Nikitich [7]

$\bf \textit{Sum and Difference Identities}
\\ \quad \\
sin({{ \alpha}} + {{ \beta}})=sin({{ \alpha}})cos({{ \beta}}) + cos({{ \alpha}})sin({{ \beta}})
\\ \quad \\
sin({{ \alpha}} - {{ \beta}})=sin({{ \alpha}})cos({{ \beta}})- cos({{ \alpha}})sin({{ \beta}})\\\\
-------------------------------\\\\$

$\bf sin(165^o)\implies sin(120^o+45^o)
\\\\\\
sin(120^o)cos(45^o)~+~cos(120^o)sin(45^o)\implies \cfrac{\sqrt{3}}{2}\cdot \cfrac{\sqrt{2}}{2}~+~\cfrac{-1}{2}\cdot \cfrac{\sqrt{2}}{2}
\\\\\\
\cfrac{\sqrt{6}}{4}~-~\cfrac{\sqrt{2}}{4}\implies \cfrac{\sqrt{6}-\sqrt{2}}{4}$

6 0

3 years ago

What is the answer to −9−(−13) its integers

Setler [38]

Answer: 4

Step-by-step explanation:

6 0

3 years ago

Find the equation of a line parallel to line y=6 that passes through the point (-2,-1)

ohaa [14]

Answer:

y=-1

Step-by-step explanation:

yeah-ya...... right?

4 0

2 years ago