Evaluating a Rational Expression
The method of substituting a value for the variables in a rational expression is called evaluating an expression.
Evaluating a Rational Expression in which m = 4 Compared with the Same Expression in which m = -4
Comparison of the results of evaluating an expression in which the variable is substituted with 4 and then with -4.
Example of Multiplying Both Equations
There is always more than one way to solve a system of equations with the elimination method. This example includes tips for deciding which term to eliminate.
Example of Solving Systems with Fractions
Solving another system of equations using multiplication and the least common denominator to find the solution.
Example of Using Multiplication to Change Terms
Two different ways of using multiplication in a system of equations to eliminate a variable are demonstrated.
Examples Using Two Points to Write an Equation
Practice writing equations given two points on a line.
Examples of Algebraic Expressions: 'two times y' and 'two y plus 5'.
Two examples of algebraic expressions that demonstrate how a letter next to a number indicates multiplication; 2Y and 2Y 5.
Examples of Division Problems with Radicals
Two division problems with radicals are demonstrated.
Examples of Quadratic Equations
Quadratic equations can have one or two variables, but in simplest form all quadratic equations have exactly one variable raised to the second power. Examples of quadratic equations are presented.
Examples of Rationalizing the Denominator
Problems involving rationalizing the denominator are presented and a shortcut is given.