## Domain and range of quadratic function y = x^2 + 6x + 7

Complex numbers, rational functions, logarithms, sequences and series, matrix operations, etc.
honest_denverco09
Posts: 42
Joined: Tue Mar 31, 2009 2:06 am
Contact:

### Domain and range of quadratic function y = x^2 + 6x + 7

What are the domain and range of quadratic function ?
Ex : Find the domain and range of y = x^2 + 6x + 7

Thanks!

stapel_eliz
Posts: 1628
Joined: Mon Dec 08, 2008 4:22 pm
Contact:
What are the domain and range of quadratic function ?
Ex : Find the domain and range of y = x^2 + 6x + 7
To learn, in general, about domain and range, try here.

In particular, since you can plug any x-value you like into any polynomial, you can plug any x-value into a quadratic.

For the range, take a look at the graph; in particular, look for the vertex, as this demarks the minimum (or, for negative quadratics, the maximum) value of y.

honest_denverco09
Posts: 42
Joined: Tue Mar 31, 2009 2:06 am
Contact:

### Re: Domain and range of quadratic function y = x^2 + 6x + 7

Thanks a lot! This is a splendid website! ^^