Question

Can someone help me with this cube roots question?

Answer 1

I can try :)

Answer 2

I know you have to substitute in the values, but I can't figure out how to simplify to get a whole number. We haven't done imaginaries yet so I know I can't use those.

Answer 3

What do you mean you can't figure out how to simplify to get a whole number?

Answer 4

You know what a cubed number is, right?

Answer 5

All the values in the example questions are getting whole numbers for y. I don't know how when they aren't perfect cubes.

Answer 6

Yes

Answer 7

They are perfect cubes >.<

Answer 8

I'm not sure what to do then

Answer 9

And take a look at that first one you did. You made a small mistake.

Answer 10

How did you get 1?

Answer 11

Oh wait is it -1?

Answer 12

\[\sqrt[3]{-1}=-1\] and then you also have to subtract 2 from that.

\(-1-2=?\)

Answer 13

Oops, -3.

Answer 14

Then how do I find the cube root of -3?

Answer 15

you don't need to find the cube root of -3. Now that you have -3, all that it means is that \[-3=\sqrt[3]{-1}-2\]

Answer 16

so -3 is your y-value. The only thing you need to take the cube root of is the x-value that was given to you

Answer 17

So the next one would be -2?

Answer 18

Yes! \(\Huge\color{lime}{\checkmark}\)

Answer 19

Then 0, then 2?

Answer 20

Yep!

Answer 21

Thank you so much!!

Answer 22

You're welcome! I'm glad I was able to help :)