Lesson 91 – Doodles Do Algebra

lesson91doodleboyToday is the last day of factoring. DoodleTwo explains that factoring is simply a way of shortening the work and simplifying your problems because you can cancel common factors, especially when you are working with fractions.

First write the problem out and then factor what you can, just like in the example worked out on the worksheet. Then you cancel common factors.

And that is exactly what your child is doing today.



1. (x^2+1)/(x+1)*(x^2-1)=(x^2+1)(x+1)(x-1)/(x+1)=(x^2+1)(x-1)

2. (x^2-5x+6)*(x^2-7x+12)/(x^2-6x+9)=(x-2)(x-3)(x-3)(x-4)/((x-3)(x-3))=(x-2)(x-4)