Real math help.
How Do You Write an Equation For a Quadratic if You Have Three Points?
Note:
Three points determine a parabola, so given three points you can write the parabola's equation. This tutorial will show you how!
Background Tutorials
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Evaluating Expressions
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How Do You Evaluate an Algebraic Expression?
Plugging variables into an expression is essential for solving many algebra problems. See how to plug in variable values by watching this tutorial.
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Quadratic Functions
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What is a Parabola?
If you graph a linear function, you get a line. If you graph a quadratic function, you get something called a parabola. A parabola tends to look like a smile or a frown, depending on the function. Check out this tutorial and learn about parabolas!
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Solving Equations by Dividing
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How Do You Solve an Equation Using Division?
Solving an equation for a variable? Perform the order of operations in reverse! Check it out in this tutorial.
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Solving Systems Using Elimination
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How Do You Solve a System of Equations Using the Elimination by Multiplication Method?
There are many different ways to solve a system of linear equations. In this tutorial, you'll see how to solve such a system by combining the equations together in a way so that one of the variables is eliminated. Then, see how find the value of that variable and use it to find the value of the other variable. Take a look!
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Solving Systems in Three Variables
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How Do You Solve a System of Equations in Three Variables Using Elimination?
The elimination method can be extended from solving a system of equations with two variables to solving a system with three variables. Watch the tutorial to find out how!
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Definitions for Quadratic Functions
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What is the Standard Form of a Quadratic?
Got a quadratic polynomial? Want to put it in standard form? Watch this tutorial to learn the steps it takes to make sure a quadratic polynomial is in standard form!
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