Question

responda
x-3y=8
xy=3

Answer 1

x-3y=8

xy=3

x=8+3y

xy=3

(8+3y)y=3

8y+3y²=3

3y²+8y-3=0

Δ=64+4.3.3

Δ=64+36

Δ=100

y=-8+-√100/2.3

y1=-8+10/6

y1=2/6

y1=1/3

y2=-8-10/6

y2=-18/6

y2=-3

Com y=1/3

x=8+3.1/3

x=9

Com y=-3

x=8+3.-3

x=-1

Logo, as possiveis soluções são:

x1=9 e y1=1/3

x2=-1 e y2=-3

Valeu!