Hi,

If i have : [attached image]

how do i obtain the other result?

Is it by rationalising denominator?

i thought that when you rationalise the denominator by multiplying it by

sqrt.k the numerator becomes: k.sqrt.k ?

Bit of confusion.

(The full question involves differentiating, however, my algebra skills have let me down :|)

thanks

NOTE: SORRY, that should be a 'k' inside the root sign, not 'x'.