Hi,

quadratic function with roots -1 and 1 and a vertex at (0, -3)

 y = a(x+1)(x-1)   ||using (x,y) ordered pair (0,-3) to solve for a

 

 

    -3 = -a

    3 = a 

 y = 3(x+1)(x-1)  0r y = 3(x^2 - 1) 

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