3 years ago

What are the two solutions to this equation? x^2−4x−8=0

Mathematics

1 answer:

77julia77 [94]3 years ago

5 0

your answer is wait hang on ive got this let me right it down

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Need help with this plz

gogolik [260]

Answer:

$x = \frac{ - 24 \pm \sqrt{ - 288} }{4} \\ = \frac{ - 24 \pm \sqrt{ ( - 1) {(12)}^{2} (2)} }{4} \\ = \frac{ - 24 \pm \sqrt{ - 1} \sqrt{ {12}^{2} } \sqrt{2} }{4} \\ = \frac{ - 24 \pm i 12\sqrt{2} }{4} \\ =-\frac{24}{4}\pm \frac{i12\sqrt{2}}{4}\\= - 6 \pm \: i3 \sqrt{2}$

3 0

2 years ago

Solve this system of equations algebraically:

Rom4ik [11]

Answer:

the answer is 5,90

Step-by-step explanation:

6 0

3 years ago

1. A = 1/2bh

OleMash [197]

1 and 2 i can't answer without proper data.
3. x+2x+2x+6 = 86
5x+6 = 86
-6 -6
5x = 80
x = 16
Side one: x is 16
Side two: 2x is 2(16) = 32
Side three: 2x+6 is 38

8 0

3 years ago

I need to solve this to get zero can you help?

Alex

Given a right triangle with the side lengths of legs = 9 and 13

For the required angle :

opposite side = 9

adjacent side = 13

so,

$\begin{gathered} \tan \theta=\frac{opposite}{adjacent}=\frac{9}{13} \\ \\ \theta=\tan ^{-1}\frac{9}{13}=34.7 \end{gathered}$

7 0

8 months ago

There are 85 telephones in the editorial department of glencoe publishing company. How many 2- way connections can be made among

sergey [27]

All of the telephones * all of the telephones minus one (because one is in use)

85 * 84 = 7140 connections

5 0

2 years ago