More Lessons for Basic Algebra

Math Worksheets

A series of free Basic Algebra Lessons.

How to find the vertex and axis of symmetry of a quadratic equation?

How to solve word problems using quadratic equations?

In a parabola, the vertex is the highest or lowest point on a parabola. To calculate the vertex of a parabola, we can first calculate the x-value by dividing the opposite of the " b" value by 2 times the "a" value. The vertex is the highest point if the parabola opens downward and the lowest point if the parabola opens upward. The axis of symmetry is the line that cuts the parabola into 2 matching halves and the vertex lies on the axis of symmetry.

In this video we find the vertex, axis of symmetry, domain and range, and x and y intercepts for a quadratic function algebraically.

In Algebra I and Algebra II, we sometimes need to solve word problems using quadratic equations. When solving word problems, some common quadratic equation applications include projectile motion problems and Geometry area problems. The most important thing when solving these types of problems is to make sure that they are set up correctly so we can use the quadratic equation to easily solve them.

This video solves a quadratic word problem that involves the area of a rectangle.

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You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.