Answers

2014-07-29T21:05:42+08:00
The answers is 
x^6
because the x^4+x^2 is same variable you can add the exponent so the answer is x^6 and if you add one it still the same 
solution
= x^4+x^2+1
= x^6+1
= 1x^6 or x^6
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