Answer :
For x > 1, the expression 1-x will be negative. The absolute value function negates it, so you have ...
... For x > 1
... -(1-x) = x - 1
For x > 1, the expression 1-x will be negative. The absolute value function negates it, so you have ...
... For x > 1
... -(1-x) = x - 1