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

User Bagheera
by
6.8k points

1 Answer

9 votes

Answer:

x = ±
\sqrt{(23)/(2√(2))}

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{(23)/(8)}

and simplify the root 8:

x = ±
\sqrt{(23)/(2√(2))}

Note: This answer may have a mistake.

User Mpjdem
by
8.4k points