jessica824
how do you find the real cube roots of -64?
Delete
Share
This Question is Closed
itsmylife
Best Response
You've already chosen the best response.
1
you cant , its a complex number if your going for root of it
confusedstudent2012
Best Response
You've already chosen the best response.
0
i think it will be 8 i
itsmylife
Best Response
You've already chosen the best response.
1
nope
itsmylife
Best Response
You've already chosen the best response.
1
4i
itsmylife
Best Response
You've already chosen the best response.
1
4*4*4=64 but still thats a complex number
confusedstudent2012
Best Response
You've already chosen the best response.
0
yes, i was thinking sqaure for some reason. 4i
jessica824
Best Response
You've already chosen the best response.
0
thank you!!
confusedstudent2012
Best Response
You've already chosen the best response.
0
but that's an imaginary number not a "real" root
itsmylife
Best Response
You've already chosen the best response.
1
;)
jessica824
Best Response
You've already chosen the best response.
0
what about -27/216??
itsmylife
Best Response
You've already chosen the best response.
1
4 is cube root of 64 and since its -64 so its an imaginary number i never said its real
itsmylife
Best Response
You've already chosen the best response.
1
n @jessica824 you can find it
jessica824
Best Response
You've already chosen the best response.
0
i dont know how
confusedstudent2012
Best Response
You've already chosen the best response.
0
no, i wasn't saying you said anything. I was responding the the original question from the original poster where the person asked about a "real" root.
zepdrix
Best Response
You've already chosen the best response.
1
@itsmylife -4 should be the cube root of -64.\[\large (-4)(-4)(-4)=-64\]
I'm not sure why you're thinking it would be complex, did you confuse it with the square root? :o\[\large (4i)(4i)(4i)=-64i\]
itsmylife
Best Response
You've already chosen the best response.
1
aha my honest mistake thanks for correcting me @zepdrix
zepdrix
Best Response
You've already chosen the best response.
1
Happens to all of us c: those darn brain farts! heh
itsmylife
Best Response
You've already chosen the best response.
1
lol :P