SOLUTION: what is Value of x; when x3-x=990

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Question 618969: what is Value of x; when x3-x=990
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
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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