How do you simplify (root3(-162x^6))?

1 Answer
Oct 3, 2015

root(3)(-162x^6) = x^2(-3root(3)(6))

Explanation:

We can take a minus out of the root, because -1 = (-1)^3

-root(3)(162x^6)

We know that x^6 = x^2 * x^2 * x^2 or x^6 = (x^2)^3, so we can take a x^2 out of the root

-x^2root(3)(162)

Lastly, all we have to do is factor the 162, so

162|2
color(white)(0)81|3
color(white)(0)27|3
color(white)(00)9|3
color(white)(00)3|3
color(white)(00)1|2*3^4

So we can take a 3 out of the root, leaving a 2*3, that is, 6 inside it. So

root(3)(-162x^6) = x^2(-3root(3)(6))