00:01
Okay, so in this question, we want to find the cube root of negative 27x to the 21st power.
00:12
So we're very used to seeing square root.
00:15
You know, that's when we multiply something by itself and we get a certain number.
00:20
We take that square root, then we get that thing that we multiply by itself.
00:23
But now we're multiplying something by itself three times, okay? so we need to multiply something by itself three times and get negative 27x to the 21st power.
00:32
So let's try and figure out what that number could be.
00:34
First of all, this is negative.
00:36
And we know that that is possible.
00:38
This would not be possible with like a square root, right? because if we multiply two negative numbers together, we can't get a negative...