Question

Find the value of the expression, when Z=-1: 2Z-Z-2

Answer 1

Step-by-step explanation:

2(-1)-(-1)-2

=-2+1-2

= -3

Answer 2

Answer:

-3

Step-by-step explanation:

Z= {-1}

So, 2z = 2*{-1} = {-2}

So, 2Z-Z-2 = 2{-1} - {-1} -2

                 = -2+1-2

                  -3