Question 1177226
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Hi
f(x) (x+3)(x-5) = x^2 - 2x - 15  0r 
f(x) = (x-1)^2 - 16
axis of symmetry is x = 1
Wish You the Best in your Studies.
{{{drawing(300,300,  -20,20,-20,20,  blue(line(1,20,1,-20))  ,  
 grid(1),
circle(5, 0,0.6),
circle(-3,0,0.6),
circle(1,-16,0.6),
graph( 300, 300, -20,20,-20,20,0, x^2 - 2x - 15))}}}

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