Identifying the Vertex and Axis of Symmetry 

This man needs to make his own youtube channel with his own production team and i bet people would watch it religiously; people with his kind of enthusiasm for math are the kind of people that make others want to listen and learn.

I am a grandma (college professor of literature) trying to support her grandson's 9th-grade math lessons. Your videos are clear, focused, and encouraging. You have a humble and humorous approach that makes math fun and doable!

you are the best teacher! Thank you for sharing your knowledge. Well done!

This guy never fails

well explained good sir

so h becomes a negative number AND you subtract? why wasn't it just x-4 rather than x(x-(-4)) ? thanks for the good videos!

You are really a Gud teacher

You are wonderful. And extremely good-looking!

Outstanding explain 👍

Tnx so much

ah damn

Ok Ed I’m not following why that 4 was changed to a negative? Seems like the sign would change but the 4 would’ve stayed positive…