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

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

Postby honest_denverco09 on Thu Apr 30, 2009 3:14 am

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

Thanks!
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Postby stapel_eliz on Thu Apr 30, 2009 11:23 am

honest_denverco09 wrote: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. :wink:

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.

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

Postby honest_denverco09 on Fri May 01, 2009 12:02 am

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