SOLUTION: how to graph a parabola using y=x2-2x-8

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: how to graph a parabola using y=x2-2x-8      Log On


   

Question 306538: how to graph a parabola using y=x2-2x-8
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
y=x^2-2x-8
The y intercept=8
0=(x-4)(x+2)
0=x-4
x=4 ans.
0=x+2
-2=x ans.
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+x%5E2+-2x+-8%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions x^2 -2x -8).