\"\"

\

\

The expression is \"\".

\

\"\"                            (Substitute x = 7.1 and y = - 2.5)

\

To subtract 7.1 means add – 7.1 and To subtract 12 means add – 12

\

\"\"

\

\

\"\"                           (Add: \"\") \

\"\"                                           (Add: \"\")\"\"

\

The value of the expression is –21.6.

\