aracelic0104owjlqb aracelic0104owjlqb

15-12-2017
Mathematics

contestada

simplify -3-(-9)

help please!!!

Respuesta :

Edufirst Edufirst

15-12-2017

To eliminate the parenthesis you must use the rule of the signs: negative times negative = positive.

=> - 3 - ( - 9) = - 3 + 9

Now you can add the numbers algebraically: - 3 + 9 = 9 - 3 = 6.

Result: 6

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