The expression you provided, $-4.9x^2 + 15x$, is a quadratic expression. Quadratic expressions generally have the form:

$ax^2 + bx + c$

where $a$, $b$, and $c$ are constants. In your case:

• $a = -4.9$
• $b = 15$
• $c = 0$

Would you like to perform a specific operation with this expression, such as finding its roots, vertex, or graphing it? I can also differentiate it or integrate it if needed.

Related Questions:

1. How do you find the roots of a quadratic expression?
2. What is the vertex of this quadratic function, and how is it calculated?
3. How would you graph the quadratic function, and what does the graph represent?
4. How do you differentiate a quadratic function?
5. What is the integral of a quadratic function, and how do you compute it?

Tip: Knowing the vertex form of a quadratic function can help you easily identify its maximum or minimum point.