Hi,

what is Value of x

x^3-x=990

x^3-x -990 = 0         Note:   is one solution   1000-10 -990 = 0  

Using synthetic division  

   10	1	0	-1	-990

		10	100	990

	1	10	99	0

(x-10)(x^2 + 10x + 99)

(x^2 + 10x + 99)









 ONe real solution, x = 10 and two imaginary solutions 

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