How to calculate this as a quadratic equation and get the roots?

A

akass2015-10-12 02:29:32

Mathematics

akass, 2015-10-12 02:29:32

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4 answer(s)

A

Alexander Latyshev, 2015-10-12
@magalex

I don't see a quadratic equation here at all.

R

Rsa97, 2015-10-12
@Rsa97

The domain of this function in a real field can be found from the condition:
2-7x ² ≥ 0
7x ² ≤ 2
x ² ≤ 2/7
x ∈ [-√(2/7); √(2/7)]

A

Antony, 2015-10-12
@RiseOfDeath

If you just need to plot a function - take a set of points x0, x1,... xn , so that x0 is the left border of what you draw (well, for example, the leftmost point that fits on the screen), and xn is the right one. n - choose based on accuracy. i.e., for example, it makes no sense to make n larger than your plot area width (in pixels).
Well, then you just count, and connect adjacent points with segments. And do not care if you have an ellipse or a straight line or a parabola or even a sine.

V

Vladimir Martyanov, 2015-10-12
@vilgeforce

Take and count, what's the problem?