The two numbers you are looking for are -21 and -8. When added together, they yield -29 (-21 + -8 = -29), and when multiplied, they give 168 (-21 * -8 = 168).
The two numbers that multiply to -72 and add to -29 are approximately 3.57 and -32.57.
-29
29
-29
29
-223
-29
529
29
1 x 29 = 29
They are 1 times 29 = 29
1 x 29 29 is a prime number.