sum (meaning adding) of a neg and a pos always neg if the negative number is bigger than the positive
product (meaning multiplication) of a neg and a pos always neg
if you have $5 (positive number) &
you owe a friend $3 (negative number).
If we calculate your total wealth by multiplying the amount you have by the amount you owe, it would be $5 x (-$3) = -$15.
This means you have a debt of $15, which is a negative amount.
when you multiply a positive number by a negative number, you are adding or gaining something in the opposite direction, which means you are actually losing or subtracting
Because you are losing or subtracting something, the result is a negative number
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