Can someone help we with this?

Simply just think of two numbers that multiply to -48.

That's -12 and 4.

Does it add up to 8:    -12 + 4 = 4 -12 = -8

It doesn't, so we revert the sign.

12 and -4            Product = 12*-4 = -48
                            Addition = 12 + -4 = 12 -8 = 8.  Correct.

The answer is 12 and -4.