If g(x) = 3x + sq rt of x, what is the value of g(d^2 +6d+9)? (Chapter 5, Page 79 - In Action problem #2) I'm struggling with the rule: sq roots have one value. In this problem, the answer key lists two solutions: one which has d+3 is greater than/= zero and the other where d+3 is less than/= zero. ...