SOLUTION: does this function have a maximum or a minimum? x^2+4x-5=0 or (-5,1) or (-2,-9) and what are the coordinates of the vertex in (x,y) form and what is the equation of the line

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: does this function have a maximum or a minimum? x^2+4x-5=0 or (-5,1) or (-2,-9) and what are the coordinates of the vertex in (x,y) form and what is the equation of the line      Log On


   



Question 140900: does this function have a maximum or a minimum?
x^2+4x-5=0
or
(-5,1)
or
(-2,-9)
and what are the coordinates of the vertex in (x,y) form and what is the equation of the line of symmetry on the graph?

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
1) It has a minimum because the coefficient of x^2 is positive.
.
2)
x^2+4x-5=0
(x+5)(x-1)=0
x=-5, x=1
(-5,1)
.
3)
(-5+1)/2=-2
Line of symmetry is a vertical line on y=-2
.
Ed
.
graph%28500%2C500%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B4x-5%29