Ask your own question, for FREE!
Mathematics 12 Online
OpenStudy (anonymous):

What is ^2√(-125) ?

OpenStudy (anonymous):

\[\sqrt[2]{-125}\] It looks a little more like this XD

OpenStudy (anonymous):

Are you allowed to use complex numbers?

OpenStudy (anonymous):

Well i have to be able to write it in decimal form, but i don't know if it will be a decimal.

OpenStudy (anonymous):

you get me? XD

OpenStudy (anonymous):

yes you can write it as $$ \sqrt {-125} = \a $$

OpenStudy (perl):

\[ \sqrt {-125} = \sqrt{-1} \cdot \sqrt{125}= i ~ \sqrt{125} \]

OpenStudy (anonymous):

i don't thunk I'm cetching on..

OpenStudy (perl):

\[ \sqrt {-125} = \sqrt{-1} \cdot \sqrt{125}= i ~ \sqrt{125}\\ = i ~ 11.1803 \]

OpenStudy (anonymous):

Yeah i think thats what the question wants XD

OpenStudy (anonymous):

So the answer is 11.1803?

OpenStudy (perl):

11.1803i , but it is an approximation

OpenStudy (anonymous):

ok thankyou!

OpenStudy (anonymous):

oh apperently it has to be a two digget number.. it could be like .12, 1.2, or 12 im not sure XD

OpenStudy (perl):

can you take a screenshot of the question, I might have missed something

OpenStudy (anonymous):

i cant, im using my computer. But the question just says "What is \[\sqrt[2]{-125}\] ?"

OpenStudy (anonymous):

\[\sqrt[2]{-125}\] oops i guess it didnt go into equation form

OpenStudy (perl):

the simplified exact solution is \[ \Large 5 \sqrt 5~ i \] the approximate solution is \( \large 11.2i \)

OpenStudy (anonymous):

hm.. so should i just round and say the answer is 11?

OpenStudy (perl):

The directions don't say to round though...

OpenStudy (anonymous):

no all they ask is for the answer XD

OpenStudy (perl):

the exact answer is preferable

OpenStudy (anonymous):

yeah but i can only have two numbers.. heh i dont know XD im just going to put 11

OpenStudy (anonymous):

do you mind helping me with 1 more?

OpenStudy (perl):

ok

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!