<prompt> Tathmini sqrt2 -sqrt2 - sqrt2 - sqrt2 - .  <response>: Kuweka x sqrt2 - sqrt2 - sqrt2 - sqrt2 - , tuna x sqrt2 - x. squaring pande zote mbili inatoa x2 2 - x, hivyo x2 x -2 0. factoring upande wa kushoto inatoa x 2 x-1 0. Kwa hiyo, x - 2 au x 1. wazi x lazima kuwa chanya, hivyo tuna x 1. 