Question

simplify: (x-1+y-1)-1

Answer 1

Answer:

( x - 1 + y - 1) - 1 = x + y - 2 - 1 = x + y - 3

Answer 2

Answer:

xy/X+y

step explation

(x

−1

+y

−1

)

−1

=(

x

1

+

y

1

)

−1

=(

xy

x+y

)

−1

=

x+y

xy