Question

resolva o sistema
x- y = 3
x.y=270

Answer 1

x - y = 3

x*y = 270


x = 3 +:y


3 + y ( y ) = 270

3 + y^2 - 270 = 0

y^2 + 3 - 270 = 0




∆ = 3^2 - 4 * 1 * (-270)

∆ = 9 + 1080

∆ = 1089

∆ = 33


X' = - 3 + 33 / 2 => 30/2 = 15


X" = - 3 - 33 / 2 => - 36/2 = - 18





x = 3 + y

x = 3 + 15

x = 18



18 - 15 = 3


18 * 15 = 270






resposta : 18 e 15




espero ter ajudado