(−82)×{(−4)+19}=(−82)×(−4)+(−82)×19
Consider LHS = (−82)×{(−4)+19}
It can be written as
=(−82)×{−4+19}
By further calculation
=(−82)×{15}=−1230
Similarly RHS = (−82)×(−4)+(−82)×19
It can be written as
=(−82)×(−4)+(−82)×(19)
=328−1558
By further calculation
=−1230
Therefore, LHS = RHS.