xy=-24
x+y=15
if y is not 0 x=24/y and y+24/y=15
y2+24=15y => y2-15y+24=0, delta = (-15)2 - 4 x 1 x 24 = 129
y = (-(-15)±sqrt(129)/(2 x 1) = (15±sqrt(129))/2
and then x = 24/y = 48/(15±sqrt(129)
The numbers are -10 and -70
-8 and -8
-4 and -25
15 and -3
-3 and 6
26
Two (or four) digits added together cannot equal 42. Two-digit numbers multiplied together cannot equal 82.
The numbers are -10 and -70
-8 and -8
Urny ony
-141
95
-4 and -25
-3 and 6
15 and -3
-13
5+5 By quadratic equation the two numbers (roots) are: 8.872983346 and 1.127016653 Added together = 10 Multiplied = 10