Curated OER
More Advanced Ratio Problem-- with Algebra (HD version)
This lesson is a bit more challenging, but Sal provides an excellent step-by-step explanation. He uses of different colors to help learners follow the process for solving this problem. As he solves one problem, he poses another and...
Curated OER
Introduction to Ratios (new HD version)
Sal defines ratios. Then he shows how to write ratios three different ways. This concept is then demonstrated with four examples for finding quantities by using ratios.
Curated OER
Advanced Ratio Problems
The instructor continues to build ratio problem-solving skills algebraically. The two examples are very involved but are thoroughly explained using algebraic steps.
Curated OER
How Do You Solve a Polynomial Equation With Two Variables?
Sometimes you'll need to solve an equation with multiple variables on each side. This step-by-step tutorial will show you how to set your equation to 0, factor out the GCF, simplify, write your answers as a set, then plug and chug to...
Curated OER
How Do You Factor a Polynomial by Grouping?
There are four terms in this polynomial. Try to factor it by grouping the terms. Confused? Try to get four terms into the product of two binomials? Still confused? Watch the instructor as she goes through the steps to group and regroup...
Curated OER
How Do You Factor a Common Factor Out Of a Difference of Squares?
How do you know that a binomial can be factored using the difference of squares? First try finding the greatest common factor and pulling that out. Then take a look at what is left. Are the coefficients perfect squares? Then it could be...