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popt9710
25.02.2020 •
Mathematics
Three choices tell you how to locate the point (−2.25, −3) . Which one does NOT?
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Ответ:
Vertex
V = (2, -12)
Axis of symmetry
x = 2
Step-by-step explanation:
To answer this question suppose the general equation of a parabola of the form:
Where a, b and c are constants that belong to real numbers.
So it is known that the vertex of this parable is:
So, we use this same formula to find the vertex of the parabola![y = -2x^2 + 8x-20](/tpl/images/0014/3629/54384.png)
Where:
The vertex of the parabola is at the point
V = (2, -12)
Finally, the axis of symmetry of a parabola always passes through its vertex. Then the axis of symmetry is the straight line
x = 2