There are no two real numbers that can do that.
-- If you're into complex numbers, then [ 2 + j 3.7417 ] and [ 2 - j 3.7417 ] will do it.
-- If, as I suspect, the fifteen was actually supposed to be negative fifteen,
then the two numbers -3 and 5 will do it.
(You also didn't say how many numbers are involved, but I just assumed that
it's two of them.)
-64
-49 and -16.
4 and 25
-8
The two numbers that multiply to 80 and add to -18 are -10 and -8. This is because (-10) × (-8) = 80 and (-10) + (-8) = -18.
-64
-49 and -16.
4 and 25
120
1155
5
110
-8
219
-18 + -18 = -36 -18 x -18 = 324 The two numbers are both -18.
129
5