SOLUTION: why does a negative times a negative equal a positive like: Simplify -2(5m-3) -10m(6) right? i was using the distributive propety

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Question 94698: why does a negative times a negative equal a positive like:
Simplify
-2(5m-3)
-10m(6)
right? i was using the distributive propety

Found 2 solutions by stanbon, edjones:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
why does a negative times a negative equal a positive like:
because -(-x) is the additive inverse of -x
but -x + x= 0
therefore -(-x) must be x
-----------------------------
Simplify
-2(5m-3)= -10m+6
-------------------------
Cheers,
Stan H.

Answer by edjones(8007)   (Show Source): You can put this solution on YOUR website!
Wrong! -10m(6)=-60m
Correct -2(5m-3)=-10m+6
EdJones

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