Hey there math peeps and welcome to MathSux! In today’s post we are going to cover factor by grouping examples, a surprisingly cool and easy factoring method used to factor quadratic equations when “a” is greater than one. It can also be used to factor four term polynomials. We are going to look at an example of each below. If you have any questions, please don’t hesitate to check out the video and try the practice problems at the end of this post. Thanks for stopping by and happy calculating! 🙂
What is Factor by Grouping?
Factor by Grouping is a factoring method that groups common factors of an algebraic expression together. Many times, we use factoring to find the x-values of a quadratic equation when the coefficient “a” is greater than 1.
When should we use Factor by Grouping?
1) If the first coefficient in a quadratic equation, a, is greater than 1:
2) When there is a polynomial with 4 terms:
Factor by Grouping Examples:
Ready for an Example? Let us look at how to factor a quadratic equation when a is greater than one.
Now, let’s take a look at another type of example, that can be solved with the help of factor by grouping!
Notice that this question is actually easier to solve than the last! The polynomial above, is already split into 4 terms, therefore, we can jump ahead, skipping the product/sum steps we did in the previous example!
Ready to try practice questions on your own? Check them out below to master Factor by Grouping!
Still got questions? No problem! Don’t hesitate to comment with any questions below. Thanks for stopping by and happy calculating! 🙂
Looking to learn about different Factoring methods? Check out the posts below!