College Algebra CLEP Prep Practice Exam

A quadratic equation is an equation where the highest power of the variable is 2, also known as a second degree polynomial. Option A is the only equation with a squared term, but it is a first degree polynomial since the highest power is 2. Option B and D are both linear equations with the highest power being 1. Only option C has a squared term and is a second degree polynomial, making it an example of a quadratic equation.