PLEASEPLEASEPLEASE
Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = -x2 + 2.5x + 1. What do the solutions of 0 = -x2 + 2.5x + 1 represent on the graph of the equation?

Question

PLEASEPLEASEPLEASE
Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = -x2 + 2.5x + 1. What do the solutions of 0 = -x2 + 2.5x + 1 represent on the graph of the equation?

anonymous · Answer

Oh, I remember doing this...

First plot $Y_1=-x^2+2.5x+1$ and then $Y_2=0$.
Find the intersection of these points. (As an aside, on a TI-83/84, you do this using the Intersect command).

As for what these solutions represents, it is:

The solutions of the equation are the x-coordinates of the intersection points of $Y_1$ and $Y_2$.

anonymous · Answer

O.o

anonymous · Answer

What?

anonymous · Answer

Is that the legit answer

precal · Answer

You could also, solve for the zeros.
On the TI 84+ and 83+, you would do 
y1=-x2 + 2.5x + 1
2nd trace zero, mark the left and right bound and then it will give it to you.

anonymous · Answer

What makes you think I was making it up?