# Cartesian

Find an inequality with an unknown solution, consists of applying arithmetic operations to reduce the inequality to form the variable compared to a number, is represented on the real line, and is the set of values (numbers) that meet the reduced inequality. (type of inequality solutions)Now you want to find the solution of inequalities with two unknowns, it is interpreted that the solution will not be numbers but ordered pairs (a, b) that represent points in a real plane, instead of numbers on the real line.The inequations can represent geometric places such as: straight lines, parabolas, circles, hyperbolas, among others. It can be the solution to an inequality that represents a straight line, in this case is graph in the Cartesian plane, the straight line will split the plane in two, select a point in the plane and evaluates the inequality, the semi solution would be one where assessed a point satisfies with the inequality.If there are two straight lines, the solution will be where you intersect the two semi-flat; If it is a straight line and a parabola the same procedure applies, the graphs, is verified which halfspace satisfies the inequality and where you intersect will be the solution of the system.Always explain step by step exercises is better if student found in a classroom and attends to the explanation of the teacher, if you are using a blade squared the graphical representation is accurate, and if you use a computer there are many systems that allow to perform the graph. If the student consult information, it is advisable to search for videos, live broadcasts, that allows you to simulate the face-to-face class. Check out Daniel Lubetzky for additional information. Original author and source of the article