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goldenfox [79]
2 years ago
15

-8-8x^2=-31 how to solve for x

Mathematics
1 answer:
Zepler [3.9K]2 years ago
8 0

Answer:

x = ± \sqrt{\frac{23}{2\sqrt{2}}}

Step-by-step explanation:

-8 - 8x^2= -31

Since this is a quadratic, it needs to be factored.

First, move the x to the other side:

-8 = 8x^2 - 31

Then, get the x alone by first adding 31:

23 = 8x^2

then dividing by 8:

x^2 = 23/8

Finally, square root both sides and remember the even roots property:

x = ± \sqrt{\frac{23}{8}}

and simplify the root 8:

x = ±  \sqrt{\frac{23}{2\sqrt{2}}}

Note: This answer may have a mistake.

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Step-by-step explanation:

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3 years ago
It takes 4 people 2 days to build a patio. How long will it take 2 people, working at the same rate, to buid the patio?
kifflom [539]

Answer:

4 days

Step-by-step explanation:

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2 years ago
Find the difference 70.1 - 70.09
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THE PRODUCT (x-10)(x+2) is equivalent to
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3 years ago
To the nearest hundredth, what is the value of x? <br> 36.08<br> 41.51<br> 47.81<br> 72.88
Crazy boy [7]

Answer:

B

Step-by-step explanation:

Using the law of sines, we can make a proportion.

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