SOLUTION: 7. Find the vertex of the graph of the following equation: y = x^2 + 8x -12. A. (4, -28) B. (-4, -28) C. (-4, 4) D. (4, 4)

SOLUTION: 7. Find the vertex of the graph of the following equation: y = x^2 + 8x -12. A. (4, -28) B. (-4, -28) C. (-4, 4) D. (4, 4)

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Question 792016: 7. Find the vertex of the graph of the following equation: y = x^2 + 8x -12.
A. (4, -28)
B. (-4, -28)
C. (-4, 4)
D. (4, 4)
Answer by waynest(281) (Show Source): You can put this solution on YOUR website!
x^2 + 8x - 12
x^2 + 8x + (8/2)^2 - (8/2)^2 -12
x^2 + 8x + 16 -16 - 12
(x + 4)^2 - 28
vertex is (-4, -28)
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