- #1

greg_rack

Gold Member

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- Homework Statement
- When simplified, 1/(1-√2)^3 is written in the form a+b√2 where a and b are integers;

what is the value of b?

- Relevant Equations
- No equations needed

Now, I obviously started by equalling the two expressions, but ending up with a 2-variables equation which of course can't be solved...

I cannot really understand from where could I take the second equation involving a and b to be able to put the two into a system of equations.

I cannot really understand from where could I take the second equation involving a and b to be able to put the two into a system of equations.