SOLUTION: Find the x-coordinate of the vertex of the function given below. y=(x-7)(x+5),I tried doing the opposites but when I typed in the answer it said it was numerically incorrect. Cou

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Find the x-coordinate of the vertex of the function given below. y=(x-7)(x+5),I tried doing the opposites but when I typed in the answer it said it was numerically incorrect. Cou      Log On


   

Question 633816: Find the x-coordinate of the vertex of the function given below.
y=(x-7)(x+5),I tried doing the opposites but when I typed in the answer it said it was numerically incorrect. Could you please help, thanks
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

y=(x-7)(x+5)

y= x^2 - 2x - 35   |completing the Square to fine the Vertex

y=(x-1)^2 -1-35

y = (x-1)^2 - 36   V(1,-36)

the vertex form of a Parabola opening up(a>0) or down(a<0), y=a%28x-h%29%5E2+%2Bk 

where(h,k) is the vertex  and  x = h  is the Line of Symmetry