To find two numbers that multiply to -10 and add to -3, we can set up a system of equations. Let's call the two numbers x and y. We have the equations xy = -10 and x + y = -3. By solving this system, we can find that the two numbers are -5 and 2, as -5 * 2 = -10 and -5 + 2 = -3.
The two numbers that add to -8 and multiply to -20 are -10 and 2. This is because -10 + 2 = -8 and -10 * 2 = -20. These numbers satisfy both conditions simultaneously.