Question

Se x+y = -16 e x.y= 64, qual o valor de x/y + y/x

Answer 1

X+Y= -16 >>>>> (-8) + (-8)= -16
X.Y = 64>>>> (-8).(-8)= 64

X/Y = -8/-8= -1
Y/X= -8/-8= -1
( -1)+( -1) = -2

Answer 2

x+y=-16
x.y=64
x=64/y

64/y+y=-16
64+y²/y=-16
y²+16y+64=0
y=-16+-√16²-4.1.64/2
y=-16+-√0/2
y=-16+-0/2
y'=y"=-8
y=-8

x-8=-16
x=-16+8
x=-8