Question 236049
Hosni gave the following argument that - (a + b) = -a + -b, for all integers a and b. If the argument is correct, supply the missing reasons. If it is incorrect, explain why not. 
-(a + b) = (-1)(a + b) ..... Def of additive inverse.
= (-1)a + (-1)b  ........... Distributive Law
= -a + -b   ................ Def of additive inverse.

=========================================================
Yes, the argument is correct.
=========================================================
Cheers,
Stan H.