HOW TO WORK (9*(X^3)) + (18X^2)) - (X^-2)

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(9*(X^3)) + (18X^2)) - (X^-2)  =                                     x^-2 = 1/x^2

9x^3 + 18x^2- 1/x^2 =

9x^2( x  + 2) - 1/x^2
by Level 8 User (36.8k points)

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