Create equations and inequalities in one variable and use them to solve problems. (Include equations arising from simple root and rational functions.)
A-CED.3
Represent constraints by equations or inequalities and by systems of equations and/or inequalities, and interpret solutions as viable or non-viable options in a modeling context.
A-REI.2
Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise.