How to know when to include a absolute value when simplifying a square root.
How to graph parabolas that are wide or skinny or upside down without making a table of values.
How to define a piecewise function.
How to use the compounded interest formula to find the value of an investment.
How to use the compounded continuously formula to find the value of an investment
How to label the roots of a quadratic polynomial, solutions to a quadratic equation, and x-intercepts or roots of a quadratic function.