Question

May someone tell me how to find range of a quadratic expression

Answer 1

My textbook hardly ever mentions it or if anyone has any utube links

Answer 2

First of all, do you know what the graph of a quadratic looks like? It either looks roughly like this: or it looks like this:

In the first case, there is only a minimum in the range and there is no maximum.

Similarly, in the second case, there is only a maximum in the range and no minimum.

Do you know how \(a\) (the coefficient of \(x^2\)) is related to the shape of the graph?