For those whom the word “math” conjures up dreadful images from their days in middle-school algebra and high-school calculus, there is Knowre, a Korean start-up founded in 2012 that hopes to save ...

In this video I work through 68 examples of factoring quadratic expressions when a is not equal to one. The first couple of ...

When you have trouble factoring trigonometric functions it is helpful to think about factoring quadratics. About Me: I make ...