When multipling signed numbers how do you know wether the number is positive or neagitive

If an odd number of minus signs are involved in a product or quotient, the sign of the result is negative. Otherwise, it is positive.

Examples:

(-1)(-1) = 1

(-1)(-1)(-1) = -1

(-1)/(-1) = 1

(-1)(-1)/(-1) = -1

The product of two positive numbers is positive:  (+)(+) = (+).

The product of one positive number and one neg number is neg:  (+)(-) = (-).

The product of two negative numbers is positive:  (-)(-) = (+)

25

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5.5

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