Search for tag: "variable"

Solving an equation written in factored form

Starts with cautiioning against multiplying the factors back together and describes the zero product property to justify this warning. Then shows how to continue from the factored form to separate…

From  Tom Grant 15 plays 0

Product Rule witih negative exponents

A multil-variable example where we can gather together like factors and then multiply them as numbers or by adding their exponents. If any negative exponents occur, then the definition of a negative…

From  Tom Grant 8 plays 0

Introduction to the product rule of exponents

The product rule is stated in general and then applied to an example.

From  Tom Grant 15 plays 0

Understanding the product rule of exponents

A quick intro to how and why the product rule for exponents works.

From  Tom Grant 9 plays 0

Solving a word problem involving a sum and another basic relationship using a system of lineaer equations

This demo discusses how to set up two equations to solve the situation described, and then choose the best method to use to solve for each of the variables.

From  Tom Grant 10 plays 0

Graph a line given by first finding its x- and y-intercepts

This video describes why the method for finding the intercepts works, then demonstrates finding the intercepts for an example equation and graphing its line.

From  Tom Grant 21 plays 0

Identifying solutions to a linear equation in two variables

A demo that shows how to substitute possible x-y ordered pairs into an equation to find out whether they create a true statement, determining which are solutions and which are not.

From  Tom Grant 22 plays 0

Writing a compound inequality given a graph on the number line

A quick demonstration of how to interpret a line graph of a compound inequality and write its algebraic form.

From  Tom Grant 8 plays 0

Graphing a compound inequality on the number line.

This presents how to graph two inequalities that are connected by either the word "or" or the word "and"

From  Tom Grant 32 plays 0

Writing a multi-step expression for a real-world situation

This demo takes some thought so you may want to watch it a few times to fully understand. Writing the expression and then we simplify it so that it is more usable in future.

From  Tom Grant 17 plays 0

Translating a phrase into a two-step expression

This video demonstrates how to change a description in words into an algebraic expression.

From  Tom Grant 23 plays 0

Solving for a variable inside parentheses in terms of other variables

This demonstrates two ways of dealing with a literal equation that has parentheses which adds an extra step in the process in the first method, bu t not the second.

From  Tom Grant 6 plays 0

Solving for a variable in terms of other variables using multiplication or division: Advanced

An examplel of how to rearrange a formula to better suit its particular purpose. Often we need to do this because it is easier to rearrange it once instead of having to solve for a variable each…

From  Tom Grant 6 plays 0

Evaluating an algebraic expression: Whole numbers with two operations

A quick demo about plugging in given values for variables and calculating a number result.

From  Tom Grant 6 plays 0

Table for an exponential function

Shows how to plug in the given x--values and get values for f(x) = b^x

From  Tom Grant 6 plays 0

Discriminant of a quadratic equation

Gives the three possible answers that result from calculating a discriminant, then demonstratew with two different quadratic equations.

From  Tom Grant 12 plays 0