document.write( "Question 1028929: f(x)=2x^2-4x-1
\n" ); document.write( "find the domain and range ( enter answers using interval notation) \n" ); document.write( "

Algebra.Com's Answer #644265 by Fombitz(32388) $\"\"$ $\"About$

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Convert to vertex form,
\n" ); document.write( " $\"y=2%28x%5E2-2x%29-1\"$
\n" ); document.write( " $\"y=2%28x%5E2-2x%2B1%29-1-2\"$
\n" ); document.write( " $\"y=2%28x-1%29%5E2-3\"$
\n" ); document.write( "Vertex is at (1,-3) and the parabola opens upwards.
\n" ); document.write( "So the domain is all real numbers.
\n" ); document.write( "The range is [ $\"-3\"$ , $\"infinity\"$ ). \n" ); document.write( "

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