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What is the value of x³ + x² + x when x=3?

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x³ + x² + x when x=3
(3)³ + 3² + 3 = 27 + 9 + 3
                     = 39
First, you need to substitute 
=(3)^3 + (3)^2 + 3
Second, 
=27+9+3
And last, is to simplify
= 39