Answer:
The second to last option.
Step-by-step explanation:
All of the numerical values are the same, so you have to pay attention to the signs (positive or negative) and if x remains in the square root or not. The last two options have the correct signs due to the multiplication of the terms. For further clarification on this, look up the FOIL method. Then, x does not remain in the square root sign of the last term.