a and b must be on opposite sides of zero (option D)
Step-by-step explanation:
if a × b = c
and c is less than zero.
c can be less than zero if a < 0 and b > 0
c can be less than zero if b < 0 and a > 0
From the above, we can say a nd b must be on opposite sides this is because the left hand side of 0 shows > 0. While the right side of 0 shows > 0.
Hence, for a × b = c where c < 0,
a and b must be on opposite sides of zero (option D)