document.write( "Question 989378: Find the domain of the following functions. Write your answer in interval notation.
\n" ); document.write( "f(x) = 7 + 3 x^2 - 9 x^4
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Algebra.Com's Answer #609730 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "It is a polynomial function, therefore the domain is all real numbers.\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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