f(x)=2x квадрат - х

It looks like you're working with a quadratic function. The function you've written can be expressed in standard form as:

\[ f(x) = 2x^2 - x \]

If you need help with specific tasks related to this function, such as finding its roots, vertex, or graphing it, feel free to ask!

Here are a few things we can explore:

1. Finding the roots (solutions for \( f(x) = 0 \))
2. Vertex of the parabola
3. Graphing the function
4. Finding the maximum or minimum value
5. Analyzing the function's behavior (intercepts, increases, and decreases)

Let me know what you would like to focus on!