METHODS TO SOLVE A LINEAR EQUATION

• Elimination Method
• Graphical Method
• Substitution Method

QUADRATIC EQUATION

 

A quadratic equation is a second-order polynomial equation in a single variable. With. Because it is a second-order polynomial equation, the fundamental theorem of algebra guarantees that it has two solutions. These solutions may be both real, or both complex.

A Summary of the Methods of Solving Quadratic Equations
Quadratic equations are of the form where a, b and c are real numbers and .
.  Quadratic equations have two solutions.  It is possible that one solution may repeat.

		Quadratic Formula:

 

The solutions of some quadratic equations are not rational, and cannot be factored.  For such equations, the most common method of solution is the quadratic formula.  The quadratic formula can be used to solve ANY quadratic equation, even those that can be factored.
Be sure you know this formula!!!

Note:  The equation must be set equal to zero before using the formula.