What may help in that particular problem is to factor out the 5 and then trying to complete the square. That method should at least be a step in the right direction i hope!
Please forgive me, but I am having a total mind block..
I am doing a question about a diver, and I have to determine when the diver hits the water. The equation is y= -5t^2 +10t +50.
I have tried simple factoring, complex factoring, and using the quadratic formula and nothing has worked =( Don't know whats going on. I know the answer is 4.3 something through my graphing calculator, but I can't get there.. I have done many questions like this before but I have been sitting here for half an hour trying to figure this one out, and I either did something wrong or I am missing something simple and stupid because I've been doing math all day.