Answers

2014-11-14T20:29:16+08:00
X³ + x² + x when x=3
(3)³ + 3² + 3 = 27 + 9 + 3
                     = 39
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2014-11-14T20:31:40+08:00
First, you need to substitute 
=(3)^3 + (3)^2 + 3
Second, 
=27+9+3
And last, is to simplify
= 39
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