Question

what is the solution to the equation x^3-x^2-990=0

Answer 1

@Hero

Answer 2

@cwrw238

Answer 3

by inspection one root is close to 10
10^3 - 10^2 = 900
11^3 - 11^2 > 990

therefore you can find this root by trial and improvement

graphing will give you a rough idea of the root and also the nature of other 2 roots
(which might not be real)

Answer 4

www.wolframalpha.com/input/?i=x%5E3+-+x%5E2+-+990+%3D+0

- see this for the graph - there is only one real root and 2 complex roots

Answer 5

www.wolframalpha.com/input/?i=x%5E3+-+x%5E2+-+990+%3D+0

- see this for the graph - there is only one real root and 2 complex roots

Answer 6

@RadEn

Answer 7

yups.. no integer number for solution
better use wolfram :)

Answer 8

wolfram?

Answer 9

wolframalpha.com

Answer 10

http://www.wolframalpha.com/input/?i=x^3-x^2-990%3D0

Answer 11

thankss

Answer 12

welcome