Math - Factoring Quadratics - Challenge

[jengberg]

I struggled a bit with this video. I went back to the traditional method of solving this (Sorry!).

Edit: @garypettie I just saw that you linked Po-Shen Loh’s explanation of this method. I will definitely watch that too. Hopefully it will result in an epiphany

Standard form:
y = -1/3x^2 + 10/3x - 16/3

Factor out the fractions by dividing by (-1/3):
y = -1/3(x^2 - 10x - 16)

Using the AC method to check what number to multiply with to get to -16, and add to get to -10:

Answer:
-1/3(x - 8) (x - 2)