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The vertex of this parabola is at (5, -4). Which of the following could be its equation?

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1 Answer

Case A: 2*(5 + 5)^2 + 4 = 2*(10)^2 + 4 = 2*100 + 4 = 204 does not equal -4
Case B: 2*(5 - 5)^2 + 4 = 2*(0)^2 + 4 = 2*0 + 4 = 4 does not equal -4
Case C: 2*(5 + 5)^2 - 4 = 2*(10)^2 - 4 = 2*100 - 4 = 196 does not equal -4
Case D: 2*(5 - 5)^2 - 4 = 2*(0)^2 - 4 = 2*0 - 4 = -4
 
The answer is D.

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