Answer:
-8 & -1
Step-by-step explanation:
Let the numbers be x and y
x+y = -9 (1)
xy = 8 (2)
(1) x = -9-y
(2) (-9-y)y = 8
-9y-y² = 8
y²+9y+8 = 0
y²+8y+y+8 = 0
y(y+8)+1(y+8) = 0
(y+8)(y+1) = 0
y = -8 , -1
x = -9-y
If y = -8, x = -9-(-8) = -1
If y = -1, x = -9-(-1) = -8
Either ways, the numbers are -8 & -1
