CK-12 Foundation
Ck 12: Algebra: Factoring by Grouping
[Free Registration/Login may be required to access all resource tools.] Group terms in quadratic expressions to help completely factor them.
Texas Instruments
Texas Instruments: Polynomial Root Finder App
This App allows students to calculate real and complex roots for polynomials up to degree 30 using eigenvalues and easily graph polynomials.
Math Medics
S.o.s. Math: Factoring Over the Complex Numbers
S.O.S. Math provides information, including examples, on factoring over the complex numbers.
CK-12 Foundation
Ck 12: Analysis: Fundamental Theorem of Algebra
[Free Registration/Login may be required to access all resource tools.] This lesson shows you how to find any solution, including imaginary ones, to a polynomial. Students examine guided notes, review guided practice, watch instructional...
Math Medics
S.o.s. Math: Factoring and Roots of Polynomials
This lesson describes a great number of topics. It gives examples and explains how to factor trinomials and other polynomials.
Discovery Education
Discovery Education: Web Math: Factoring Polynomials by Finding the Gcf
This WebMath online tool is useful for factoring polynomials by finding the greatest common factor. Simply plug the numbers in and you are on your way!
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Factoring Polynomials by Grouping
Twenty-five problems on factoring polynomials by grouping. To review the basics on this topic, click the "View Lesson" button at the top.
Texas Instruments
Texas Instruments: Multiplying/factoring Polynomials
Students will be given binomials to multiply or trinomials to factor. The teacher will enter the binomials/trinomial into activity center and students must send in other form. Correct answers should match teacher graph.
Sophia Learning
Sophia: Simplifying Rational Expressions: It's Simple
Learn to simplify rational expressions using factoring. Includes a short video [1:37] and a practice problem in a slideshow.
Oswego City School District
Regents Exam Prep Center: Factoring Trinomials (A=1)
This site from the Oswego City School District shows students how to factor trinomials when the leading coefficient is equal to 1. The example walks students through the process so they can learn to do it on their own. Includes link to...
Lawrence Hall of Science
The Math Page: Skill in Algebra: Factoring Trinomials
Here is a site that clearly and thoroughly explains factoring trinomials, including those with leading coefficient other than 1. There are example problems solved, problems for the student to attempt, and answers to the student problems....
Lawrence Hall of Science
The Math Page: Skill in Algebra: Common Factor
Here is a site that thoroughly explains many topics related to factoring out the greatest common factor from a sum or a polynomial expression. There are example problems, problems for the student to attempt, and answers to the student...
Purple Math
Purplemath: Factor Theorem
Purplemath.com discusses the Factor Theorem, explaining its relationship to the Remainder Theorem. The lesson has a link to synthetic division, a key to discovering if a value is a root.
Other
The Math Center: Advice for Factoring Polynomials
This is a general resource on how to factor any polynomial. It reads like a flow chart on the decision-making process. Contains information about factoring polynomials with two, three, or four terms.
Paul Dawkins
Paul's Online Notes: Factoring Polynomials: Practice Problems
Practice exercise reviews factoring polynomials including how to factor out the greatest common factor, factoring by grouping, factoring quadratics, and factoring polynomials with degree greater than 2.
Math Planet
Math Planet: Factoring Polynomials
Gain an understanding of how to factor polynomials by viewing examples and a video lesson.
Cool Math
Coolmath: Factoring Polynomials by Grouping
This algebra lesson explains how to factor by grouping.
Cool Math
Coolmath: Complex Numbers Factoring the Sum of Two Squares
Use this algebra lesson to learn how to factor the sum of two squares.
CK-12 Foundation
Ck 12: Algebra: Factorization of Quadratic Expressions
[Free Registration/Login may be required to access all resource tools.] This lesson covers factoring quadratics when the leading coefficient is not one. Students can watch a video on factoring and then practice by attempting the problems...
Math Planet
Math Planet: Polynomial Equations in Factored Form
All equations are composed of polynomials. If you know how to solve equations containing polynomials of the first degree, then you can solve equations of higher degree. One way to solve a polynomial equation is to use the zero-product...
Math Planet
Math Planet: Factor Polynomials of the Form of X^2 + Bx + C
This resource is about factorizing trinomials of the form x^2+bx+c by making them into a product of two binomials x^2+bx+c=(x+m)(x+n) where m+n=b and m*n=c
Math Planet
Math Planet: Factor Polynomials on the Form of Ax^2 + Bx +C
You can factor polynomials of the form ax^2 + bx + c. If a is positive, then ax^2+bx+c=(x+m)(ax+n) where c = m*n, a*c = p*q and b = p+q = a*m + n
Purple Math
Purplemath: Numerical Approximation of Zeroes: The Midpoint Method
Explains the reasoning and methodology for the process of numerically approximating the zeroes of a non solvable polynomial.
Illustrative Mathematics
Illustrative Mathematics: A apr.b.3 and a apr.b.2: Graphing From Factors Iii
The task has students use the remainder theorem to deduce a linear factor of a cubic polynomial, and then to completely factor the polynomial. Aligns with A-APR.B.3 and A-APR.B.2.