Asked by:

els41880
Rating (1): A+
Questions Asked: 175
Tutorials Posted: 4, earned $1.88

 

$1.00 Chapter 4 OA 4-2 #42

• From Mathematics: General-Mathematics
• Closed, but you can still post tutorials
• Due on Nov. 03, 2009
• Asked on Nov 03, 2009 at 1:54:28PM

Q:

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)

= (-1)a+ (-1)b

= -a + -b

 

Attachments: