3. what are the coordinates of the vertex of the graph of the function y = –3x² –12x + 3? (1 point

The function y = –3x² –12x + 3 is a parabola facing either upward of downward. we use completing the squares to find the vertex. 

y = -3(x² + 4x + 1) 

(k/2)^2 = (4/2)^2 = 4
y = -3(x² + 4x + 4 + 1 - 4) 

y = -3(x + 2)² + 9 
y- 9  = -3(x + 2)² 
vertex is equal to at (-2,9)

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