simplify the square root of 18 m to the 9th power
sqrt (18^9)
= sqrt(18*18*18*18*18*18*18*18*18)
= sqrt(18^2 * 18^2 * 18^2 * 18^2 * 18)
=(18*18*18)sqrt(18)
= sqrt(18*18*18*18*18*18*18*18*18)
= sqrt(18^2 * 18^2 * 18^2 * 18^2 * 18)
=(18*18*18)sqrt(18)