| ijm8710, I thought exactly the same thing you did, I thought maybe that was the problem, but the problem asked for k-n
and I got k = -6, and n = 6
so k-n = (-6) - 6 = -12
I thought maybe n could equal -6 too, which would be (-6) - (-6) = 0, but we were told in the problem that n > 0 so n must be the positive square root of 36, not the negative one, so n must be 6. |