Better Students Ask More Questions.
Determine the vertex, the equation of the axis of symmetry, and the maximum or minmum...
1 Answer | add yours
Middle School Teacher
Use FOIL to multiply (x-6)(x+4)
x^2 - 6x + 4x - 24
x^2 - 2x - 24
In standard form:
y = x^2 + (-2x) + (-24)
a = 1, b = -2, c = -24
The vertex is (x,y) where x = -b/2a
x = 2/2*1 = 1
Substitute 1 in for x in the equation to find y
y = 1^2 + (-2*1) + (-24)
y = 1 + (-2) + (-24)
y = -25
Vertex: (1, -25)
Since the parabola opens up, this point is the minimum.
The equation for the axis of symmetry is x = 1
Posted by samhouston on November 16, 2011 at 11:32 AM (Answer #1)
Join to answer this question
Join a community of thousands of dedicated teachers and students.