Find the profit function P(x) determined by the given cost and revenue functions. (See Example 6.) R(x) = 21x
C(x) = 15x + 56

P(x) =

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.