Solve for xxx.
Write the smaller solution first, and the larger solution second.
(x +6)(-x +1)=0(x+6)(−x+1)=0

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