Question

5. What should we multiply by? to get 1 as
the answer?​

Answer 1

Answer:

multiply-

1×1=1

-1×(-1)=1

Hope it will help you friend.

Answer 2

For the given condition, they're are two solutions:

$a) \: \: 1 \times 1 = 1$

$b) \: -1 \times -1 = 1$