I'm teaching my students about factoring quadratics. We've done GCF, difference of two squares, squared binomials, and grouping. One of my colleagues then found this asterisk method on line.
It's basically the grouping method but presented in a little different light. Has anyone ever seen this or used it? My bosses would prefer learning the guess and check method, or the grouping method, but if you factor out a CGF before, this method works for all of them. I would like my students to be able to recognize the special cases and not have to resort to any work if they see $a^2x^2-c^2$ or if they see $(ax)^2+2abx+b^2$, but if they are struggling with those and can grasp this method, would anyone here use this method?