document.write( "Question 70856This question is from textbook
\n" ); document.write( ": Determine algebraically whether the function is even, odd or neither.
\n" ); document.write( "a) f(x)= X2(x squared) - 2\r
\n" ); document.write( "\n" ); document.write( "b) f(x) = 3x4 + 2x2 - 7 \n" ); document.write( "

Algebra.Com's Answer #50642 by jim_thompson5910(35256) $\"\"$ $\"About$

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Both are even since they have symmetry across the y axis. Also f(x)=f(-x) is applicable to both of these equations which means they are even. For instance if I plug in x=2 into a) I get
\n" ); document.write( " $\"%282%29%5E2-2=2\"$
\n" ); document.write( "Now let x=-2
\n" ); document.write( " $\"%28-2%29%5E2-2=2\"$ Which proves f(x)=f(-x) and shows it is an even equation. The same applies to the 2nd one also. \n" ); document.write( "

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