Question 377947
You are very close. The only problem is that square roots are supposed to be positive (or zero). {{{x^9}}} could be negative if x is negative. And we have no reason to say that x cannot be negative. So we have to do something to ensure that our answer is positive (or zero).<br>
Absolute value comes to the rescue:
{{{sqrt(x^18) = abs(x^9)}}}