Which of the functions below have exactly
two distinct real zeros?
1. f(x) = -x2 + 14x – 45
II. f(x) = 4x2 + 4
III. f(x) = 2x2 + 12x + 18
IV. f(x) = 3x2 - 4x - 4

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.