By Gerald Erichsen. There are few things more confusing for beginning Spanish students, at least those who have English as their first language, than learning the differences between ser and estar. After all, they both mean to be in English.I'm not using the terms in a grammatical sense here.) Ser tells you what something is, the nature of its being, while estar refers more to what something does. I might use soy (the first-person present of ser) to tell you what I am, but I'd use estoy (the first-person present of estar) to tell you what I am being.
In mathematics, a quadratic form is a homogeneous polynomial of degree two in a number of variables. For example, + â is a quadratic form in the variables x and y.
Note: When you're dealing with quadratic equations, it can be really helpful to identify a, b, and c. These values are used to find the axis of symmetry, the discriminant, and even the roots using the quadratic formula. It's no question that it's important to know how to identify these values in a quadratic equation.