Answer: the second choice is the answer because of the distributive property and how when you distributive the 5 to the 6 it means 5x6 and it will equal -30
The square root of x will be evaluated first before the addition of 5. Hence (-3)^2 = 9 and 9 +5 = 14, as per your teacher's answer, which is correct. The answer would not be -4.
