Question

Resposta
X-y=5
X.y=24

Answer 1

x-y=5    

xy=24  ==>x=24/y

24/y-y=5

24y-y²=5y

y²+5y-24=0

y'=[-5+√(25+96)]/2=(-5+11)/2=3

y''=[-5-√(25+96)]/2=(-5-11)/2=-8

Se y=3  ==>x=24/3=8
Se y=-8 ==>x=24/(-8)=-3