Question

Dos numeros que multiplicados me den 12 y sumados menos 7 !

Answer 1

xy=12
x+y=-7

x=-7-y

(-7-y)y=12
-7y-y^2=12
y^2+7y+12=0
(y+3)(y+4)=0
y+3=0
y=-3

(y+3)(y+4)=0
y+4=0
y=-4

Los numeros son -4 y -3

-4×-3=12
-4+(-3)=-7