y = 2x2 – 4x + 7
Take the 1st derivitave and set it equal to zero.
4x – 4 = 0
4x = 4
x = 1 <<—— this is the x-coordinate
Substitute 1 back into the original equation.
y = 2x2 – 4x + 7
y = 2 – 4 + 7
y = 5 <<—— this is the y-coordinate
Vertex is at (1, 5)
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