document.write( "Question 991271: Find the domain and range of the quadratic equation f(x)=x^2-8x-9 \n" ); document.write( "

Algebra.Com's Answer #611122 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "The domain of any polynomial function is the set of real numbers.\r
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\n" ); document.write( "\n" ); document.write( "The lead coefficient of your quadratic is positive, therefore the graph is a parabola that opens upward. Hence the minimum value is the value of the function at the vertex. Find the

-coordinate of the vertex by dividing the opposite of the first-degree term coefficient by two times the lead coefficient and then finding the value of the function by evaluating the function at the

-coordinate of the vertex. The range is then all real numbers greater than or equal to the value of the function at the vertex.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it\r
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