What are the numbers when you add you get -3 when multiplied you get 40?
There are no two real numbers that do.
Using complex numbers, these two do:
(-3/2 + i√151/2) & (-3/2 - i√151/2)
Two numbers that add to -3 and multiply to -40 are -8 &
5
Two numbers that add to 3 and multiply to -40 are 8 & -5
Two complex numbers that add to 3 and multiply to 40 are (3/2 +
i√151/2) & (3/2 - i√151/2)