Question

(i) If a × (−1) = −30, is the integer a positive or negative?
(ii) If a × (−1) = 30, is the integer a positive or negative?

Answer 1

(i) a × (−1) = −30

When multiplied by a negative integer, a gives a negative integer. Hence, a should be a positive integer.

a = 30

(ii) a × (−1) = 30

​When multiplied by a negative integer, a gives a positive integer. Hence, a should be a negative integer​.

a = −30