Question

qual e o'ponto de encontro entre as retas no plano c : x-y=0 x+y=0.
a)(2,0)
b)(0,2)
c) (2,2)
d) (0,0)
e) (1,1)

Answer 1

Olá !

X + Y = 0
X - Y = 0

X = 0 + Y


0 + Y + Y = 0
0 + 2Y = 0
2Y = 0 - 0
2Y = 0
Y = 0/2
Y = 0

X = 0 + Y
X = 0 + 0
X = 0


Resposta : S = { 0 , 0 } ; Alternativa (D)