A student says that the zeros of y=(x-2)(x+7) are -2 and 7. Is the student​ correct? If​ not, describe and correct the error.

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected