Question 633816
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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(x-h)^2 +k}}} 
where(h,k) is the vertex  and  x = h  is the Line of Symmetry