Question

(iv) When we multiply any integer by (-1), what is the result?
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Answer 1

Answer:

When the integers have same sign: The multiplication of two integers, both positive or both negative, is always a positive integer equal to the product of their absolute values. And in other words when both the numbers have same (like) signs, the result of the multiplication is always positive.

Answer 2

Answer:

Every integer when multiplied with −1 gives its multiplicative inverse.

Hope it helps you...