Hi,  This was an example today

y = x^2 +2x - 8  ||factoring (x+4)(x-2) = 0 , x = -4  0r  x = 2 are the solutions

,  x = -1 ± 3

y = x^2 +2x +1 - 1 - 8  Completing the Square

y = (x+1)^2 - 9  V(-1,-9) and line of symmetry is x = -1

and when y  = 0 ⇒   (x+1)^2 = 9, x = -1 ± 3, Pt(2,0) & (-4,0) are the x-intercepts



 

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