Question 103582
What property is m[t+(-t)]= mt+m(-t) 
The distributive property
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 m[t+(-t)]=m(-t+t)
The commutative property allows you to change t+(-t) to (-t+t)
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 and m[t+(-t)] = [t+(-t)]m
The commutative property allows you to swithc the order of the factors.

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Cheers,
Stan H.