Two numbers multiply to be 4 and add to be -5

-1, -4

Step-by-step explanation:

x + y = -5

x×y = 4

=>

x = -5 - y

=> (-5 - y) × y = 4

-5y - y² = 4

y² + 5y + 4 = 0

the solution for a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

a = 1

b = 5

c = 4

x = (-5 ± sqrt(25 - 16))/2 = (-5 ± 3)/2

=> x = -2/2 = -1 or x = -8/2 = -4

=> y = 4/-1 = -4 or y = 4/-4 = -1

since the sequence in an addition and multiplication does not make any difference, the two numbers are simply -1 and -4

the answer to the expression is 83