# Math

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How would you simplify the cubed root of 54x^17

??

• Math -

(54x^17)^(1/3)
= (27x^15)^(1/3) (2x^2)^(1/3)
= 3x^5 (2^(1/3) x^(2/3)

• Math -

First I factor 54.
5 4
| |
9 6
|\ \ \
3 3 3 2
{3 3 3} group of threes that can be out of cubed root
Because there are three threes I take them out of the cubed root (# = im going to consider this as my cubed root button) turning #54x^17 into 3#2x^17

Now we factor x^17:

there are 5 groups of 3s in 17 so we would take those out leaving x^2 in the root.

3#2x^17 turns into 3x^5 # 2x^2
Then this simplified is therefore

3x^5 cube root of 2x^2

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