the end behavior refers to what happens when x approaches negative infinity and infinity
as x approaches negative infinity (to the left), the values are all negative inside the parentheses so multiplying -∞ * -∞ * -∞, you get g(x) approaches -∞ as x approaches -∞
as x approaches ∞(to the right), the values inside the parentheses are all positive ∞ so multiplying ∞*∞*∞, you get g(x) approaches ∞ as x approaches ∞
