4.5 - 8.35i and 4.5 + 8.35i (to 2 dp)
where i is the imaginary square root of -1
71
133
It is not possible to multiply two prime numbers and get 90. You can add 43 and 47.
77
12 10 10 10
18 and -5
71
-117
The numbers are 10 and -9
71
69
If you've written this down correctly, there aren't two whole numbers that satisfy these conditions. The closest is -98 and 4, which multiply to -392, but add to -94.
-117
133
-30 and 3
-9 and 10
111