Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Lesson Check - Page 563: 5

The zeroes of a function are the values of x where $y = 0$ Example: $y = x^2+4x+3 $ $-1$ and $-3$ are the zeroes.

The zeroes of a function are the values of x where $y = 0$. For the second part of the question, pick a random quadratic (make sure that zeroes exist for it), and find the zeroes.