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31-05-2018
Mathematics

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What is the vertex is of the graph of y=-2x^2+8x+9

Respuesta :

31-05-2018

Hi,
[tex]y=-2x^2+8x+9\\ =-2(x^2-4x+4-4)+9\\ =-2(x-2)^2+8+9\\ =-2(x-2)^2+17\\ [/tex]

Vertex is (2,17)

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