Khan Academy
Extraneous Solutions to Radical Equations, Algebra I
In this video, Sal brings it all together and incorporates the concepts from previous lectures (quadratic formula, multiplying polynomial expressions, radical expressions, exponents). This video would be a great way to end a unit or...
Khan Academy
Factoring Special Products, Polynomial and Rational Functions, Algebra II
"Just to get the point drilled into your head," Sal continues his lecture on factoring quadratic expressions, focusing on special products. He works to instill the problem-solving skills necessary to factor in equations quickly and...