Steps:
So firstly, let's set up our equation. Since we are finding the difference between the 2 polynomials, this is going to be a subtraction problem:

Next, foil -(-0.04x² + 26x - 170). (Treat the minus sign on the outside as -1):

Next, combine like terms:

Answer:
In short, your final answer is C: -0.02x^2 + 6x + 70