Practical Problem: The Area of a Garden
Using multiplication of polynomials in a practical problem.
Identities for Addition and Multiplication Defined
An equation is a statement that two quantities are equal. Explanation of an identity equation and identifying a statement that is not an equation.
Solving Equations: Summary: Solving Equations
This clip summarizes how to solve equations. It describes the relationship between word problems, number sentences and equations, noting that the latter are, "
nothing more than a statement that two mathematical expressions are equal." The clip rev...
Solving Equations: Solving An Equation
This clip describes the steps in solving a simple equation. It states that "...the important thing is to study the equation, decide what you want to move around or get rid of, and proceed step by step." It also advises that "
it's usually easiest t...
Solving Equations: Using An Equation to Solve a Word Problem
This clip explains that, "
what makes equations tricky is that there's no set rule for doing them all. You have to size up each one separately, decide what needs doing, and get it done." The clip then goes through an equation step by step, beginnin...
Solving Equations: Unknowns, Coefficients and Constants
This clip introduces the terms "unknowns," "constants" and "coefficients," and explains the role each plays in a word problem.
Solving Equations: Building and Solving A New Equation
This clip explains how to work through an equation step by step, beginning by "collecting" all the unknowns on one side of the equation and all the constants on the other.
Solving Equations: Equation Involving Subtraction, An
This clip demonstrates how to solve an equation involving subtraction, X-9=7, which eventually comes out to be X=7+9, or 16.