Using a graphing utility to find the point of intersection of the graphs. Then confirm your solution algebraically.
y=3x^2
y=2x^2-8x-15
I did this graphically and I got (-3,27). How do I find the solution algebraically? I know it can't be hard, but I can't find it in the book.
Can I say something though ? The question is wrong. You must give different letters to different equations. What you wrote means that for any in , , which is wrong.
So I would rather denote the two parabolas like this :
Thus solve for , ... and Von Nemo already answered this I was just posting because of this (since solving for is absolutely meaningless, even though you understand it ... I mean let's talk math !)