how to solve this question? x3+1|x3 where x=2+root 3 in this x3 is x cube.

Asked by  | 15th Aug, 2012, 12:44: PM

Expert Answer:

Use the identity a3 + b3 = (a + b)(a2 - ab + b2)
 
So, x3 + 1/x3 = (x + 1/x)(x2 - 1 + 1/x2)
Now, find the required values and substitute in the above equation.

Answered by  | 15th Aug, 2012, 10:03: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.