A: -4,3
The x coordinate of the vertex is given by
x = -b/2a and the y coordinate of the vertex is given by y= f( -b/2a), we need to transform the equation to the form ax^2 + bx + c
We have: 5(x+4)^2+3
= 5x^2+ 20x + 23
Then we substitute
x= -20/2*5 y= f(-20/2*5)
= -4 = f(-4)
=3
So V(-4,3)
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