Question

x-y+z = 0
2x -y-z = -3
x+y-2z = 0

Answer 1

Explicação passo-a-passo:

1 -1 1

2 -1 -1

1 1 -2

D = 2 + 1 + 2 + 1 + 1 - 4

D = 3

0 -1 1

-3 -1 -1

0 1 -2

Dx = 0 + 0 - 3 + 0 + 0 + 6

x = Dx/D

x = 3/3

x = 1

1 0 1

2 -3 -1

1 0 -2

Dy = 6 + 0 + 0 + 3 + 0 + 0

Dz = 6 + 3 - ( )

Dz = 90

Dz = 9

y = Dy/D

y = 9/3

y = 3

1 -1 0

2 -1 -3

1 1 0

Dz = 0 + 3 + 0 + 0 + 3 + 0

Dz = + 3 + 3 - ( )

Dz = 60

Dz = 6

z = Dz/D

z = 6/3

z = 2

S = {(1, 3, 2)}