Question

resolva o sistema de equaçoes x+y=2 x2+y2=10

Answer 1

x + y = 2
x^2 + y^2 = 10

x = 2 - y
(2 - y)^2 + y^2 = 10
4 - 4y + y^2 = 10
y^2 - 4y + 4 - 10 = 0
y^2 - 4y - 6 = 0
y = 4 +-squart 4^2 - 4 . 1 . -6 /2.1
y = 4+-squart 16 + 24/2
y = 4 +-squart 40/2
y = 4 +- 2V10/2
y = 2+-V10/2