Question

Which expression has been simplified INCORRECTLY? * 1 point - (-9) = 9 - (+9) = -9 + (-9) = -9 + (+9) = -9

Answer 1

+ (+9) = -9

Explanation:

- (-9) = 9 A negative times a negative is a positive

- (+9) = -9 A negative times a positive is a negative

+ (-9) = -9 A positive times a negative is a negative

+ (+9) = -9 A positive time a positive is a positive