Diasy

1. Community
2. Study Group

I have tried using the hints to understand but i don't. I don't get where that +(4.2)^2 in hint 4 is coming from, or how you get to the next step.> (AE)^2+8.4(AE)=576> (AE)^2+8.4(AE)+(4.2)^2 = 576+...