Question

simplify the following radical expression:
3 sqrt () -216x^2/x^2
a) sqrt() -6x
b)-6
c)-6 sqrt()x
d) 6 sqrt()-x

Answer 1

If I have read your data correctly (I'm not sure what "()" means), and there are no typos:

3 * √(-216x^2/x^2)

x^2's cancel each other out.

3 * √(-216)

This does not match any of your choices.