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x=8

x=-8 too it's both

^ :D

lol

Thanks:)

Np.

np :D

haha

\[x^2+64=0 \] has only solutions in \[ \mathbb{C}\] though

ur finding x not b or c

yes, can you take the square root from a negative number?

Take a look at this:
http://www.wolframalpha.com/input/?i=x%5E2%2B64%3D0

i just know the answer i'm not really good at other things :/ sorry

Anyway, in Reals this one has no answer, so -> no solution

ummm idk O.o i think it's x= -8;8