Fill in the blanks.
To solve a polynomial inequality, find the ________ numbers of the polynomial, and use these numbers to create ________ ________ for the inequality.
The formula that relates cost, revenue, and profit is ________.
In Exercises 5 - 8, determine whether each value of is a solution of the inequality.
Inequality$ x^2 - x - 12 \ge 0 $
Values(a) $ x = 5 $ (b) $ x = 0 $ (c) $ x = -4 $ d) $ x = -3 $
Inequality$ \dfrac{3x^2}{x^2 + 4} < 1 $
Values(a) $ x = -2 $ (b) $ x = -1 $ (c) $ x = 0 $ (d) $ x = 3 $
In Exercises 9 - 12, find the key numbers of the expression.
$ 9x^3 - 25x^2 $
$ \dfrac{x}{x + 2} - \dfrac{2}{x - 1} $