Question

Can someone please me to solve this:

3√-64

Answer 1

is the sqrt or cubed root?

Answer 2

square root

Answer 3

\[3\sqrt{-64} = 24i\]

Answer 4

how?

Answer 5

if it's cubed , then[ (-2^3)^2 ](1/3)=4

Answer 6

using radicals

Answer 7

if it sqrt , 3*sqrt(64) i = 24 i

Answer 8

\[3\sqrt{-64} = 3\sqrt{-1}\sqrt{64} = 3*i*8 = 24i\]

Answer 9

what i stands for?

Answer 10

I assume you're confused about the question, if you don't know what i is then you probably mean:
\[\sqrt[3]{-64}\]
In which case, the answer is -4
(-4)^3 = -64

Answer 11

i am going to make a bet that it says
\[\sqrt[3]{-64}\] so it is
\[\sqrt[3]{-64}=-4\] because
\[(-4)^3=-4\times -4\times -4=-64\]

Answer 12

@alfers read "cubed root of -64" it means the number whose cube is -64

Answer 13

the little 3 is called the "index" and if you don't see one that means square root
but for example
\[\sqrt[4]{16}=2\] because
\[2^4=16\]

Answer 14

oh okay i get it. thank u so much how about this one?

5√-32 ??

Answer 15

think of a number that when you raise it to the fifth power you get -32

Answer 16

i give you a hint, it can't be very big because it is going to be -32 when you raise it to the fifth power
also it must be negative

Answer 17

now i get it thank u so much!