SOLUTION: help me solve quadractic equations by graphing 2x(squared) + 4x= 6

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: help me solve quadractic equations by graphing 2x(squared) + 4x= 6      Log On


   



Question 67212: help me solve quadractic equations by graphing

2x(squared) + 4x= 6

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
help me solve quadractic equations by graphing:
y = 2x^2 + 4x - 6
--------------
You could plot some points to see the graph.
or
You could find the vertex at (-b/2a, f(-b/2a))
-b/2a=-4/4=-1
f(-1)=2-4-6=-8
So the vertex is at (-1,-8)
The y-intercept is at f(0)=-6
--------
The graph looks like this:
graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C2x%5E2%2B4x-6%29
Cheers,
Stan H.