• #### Review of the Methods of Factoring - Problem 1

##### Math›Algebra 2›Factoring
How to factor by taking out the greatest common factor.
• #### Adding and Subtracting Polynomials - Problem 4

##### Math›Algebra›Polynomials
Explanation of common errors in adding and subtracting polynomials, particular in terms of working with exponents on variables
• #### Arithmetic Sequences - Problem 1

##### Math›Precalculus›Sequences and Series
How to find a specified term number in an arithmetic sequence when given the first term and common difference.
• #### Arithmetic Sequences - Problem 1

##### Math›Algebra 2›Sequences and Series
How to find a specified term number in an arithmetic sequence when given the first term and common difference.
• #### Factoring Trinomials, a is not 1 - Problem 9

##### Math›Algebra›Factoring
Factoring trinomials with a greatest common factor the results in "a" equaling one
• #### Factoring: Special Cases Part II - Problem 4

##### Math›Algebra›Factoring
Factoring completely by looking for greatest common factors at the beginning and end of a factoring process
• #### Adding and Subtracting Rational Expression - Problem 1

##### Math›Algebra›Rational Expressions and Functions
How to add or subtract rational expressions that already have a common denominator.
• #### Solving a Rational Equation - Problem 1

##### Math›Algebra 2›Rational Expressions and Functions
How to solve a rational equation by multiplying by the least common denominator.
• #### Adding and Subtracting Rational Expressions - Problem 4

##### Math›Algebra 2›Rational Expressions and Functions
Adding and subtracting rational expressions that already have common denominators with attention to domain restrictions.
• #### Solving Rational Equations with Unlike Denominators - Problem 4

##### Math›Algebra›Rational Expressions and Functions
How to solve rational equations when the common denominator has three factors.
• #### 3x3 Determinants - Problem 3

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to determine the effect of a row's common factor on the value of a determinant.
• #### Adding and Subtracting Rational Expressions - Problem 5

##### Math›Algebra 2›Rational Expressions and Functions
Adding and subtracting rational expressions that already have common denominators and binomial numerators.
• #### Adding and Subtracting Rational Expression - Problem 4

##### Math›Algebra›Rational Expressions and Functions
How to add or subtract rational expressions when the common denominator has three factors.
• #### Solving Rational Equations with Like Denominators - Problem 1

##### Math›Algebra›Rational Expressions and Functions
How to solve rational equations when one side has a common denominator.

##### Science›Biology›Evolution
The fast evolution of species with a common ancestor.
• #### Percents - Problem 4

##### Math›Algebra›Pre-Algebra
Estimation techniques for percents, including how to mentally calculate common percentages
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• #### Nouns

##### English›Grammar›Parts of Speech
The different types of nouns and how to use them.
• #### Prime Factorization - Problem 2

##### Math›Pre-Algebra›Prime Numbers
Finding the greatest common factor using factor trees
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• #### Order of Operations - Problem 4

##### Math›Algebra›Pre-Algebra
Common errors in applying exponents to negative bases versus subtraction problems
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