The factor pairs of 30 are (30,1)(15,2)(10,3)(6,5)
None of them add up to 20.
The numbers are: 9+sq rt of 11 and 9-sq rt of 11
33
13
multiplied to seventy and add to nine is impossible, but add up to 9 and multiplied to -70, or add up to -9 and multiplied to 70 are possible. In that case, 14 and -5 would do it (or -14 and 5)
-5 and 3
-3 and 5
The numbers are: 9+sq rt of 11 and 9-sq rt of 11
33
The numbers are: 80 and -20
575
21
13
multiplied to seventy and add to nine is impossible, but add up to 9 and multiplied to -70, or add up to -9 and multiplied to 70 are possible. In that case, 14 and -5 would do it (or -14 and 5)
What to number multiple to get 48 but add to get 13
2366
78
-30