### Instruction: What is the radical conjugate of $\sqrt{11}-1$?### Response: I need to find a radical expression that has the same coefficient as $\sqrt{11}$ but the opposite sign of the constant term.
This is because when I multiply two such expressions, I get a difference of squares, which eliminates the radicals.
For example, $(\sqrt{11}-1)(\sqrt{11}+1) = 11 - 1^2 = 10$.
So, the radical conjugate of $\sqrt{11}-1$ is $\sqrt{11}+1$.