Question

Ajudaaaa aiii pfvvvv gente

Answer 1

Vamos lá.

a)

x + y = 3

x*y = 2

x + 2/x = 3

x² - 3x + 2 = 0

delta d = 1

x1 = (3 + 1)/2 = 2,  y1 = 1

x2 = (3 - 1)/2 = 1, y2 = 2

b)

-x + y = 3

x*y = 0

x*(3 + x) = 0

x1 = 0, y1 = 3

x2 = -3, y2 = 0

c)

x*y/4 = 4

x - y = 0

xy = 16

y = x

x² = 16

x1 = 4, y1 = 4

x2 = -4 , y2 = -4