Simplify the expression: x2 + x(x – 5) – x + 7 a. 2x2 – 6x + 7 b. x3 –5x + 7 c. 6x2 – x + 7 d. –5x2 – x + 7

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.