What adds to -3 but multiplies to 12?

Answer 1

There is no pair of real numbers.

In the complex field, there is the pair: -1.5 - 3.1225*i and -1.5 + 3.1225*i where i is the imaginary square root of -1.

Alternatively, in real numbers, you have a set of 12 numbers : 3*4*(-1)10