Jawab: 7.c
Penjelasan dengan langkah-langkah:
2x -y+z =7
x+2y-z=-6 +
3x +y = 1
4x -2y-z=5
2x-y+z =7 +
6x-3y=12 = 2x -y = 4
3x+y = 1
2x-y =4 +
5x =5
x=1
3.1 +y = 1
3+y =1
y= -2
2x-y+z =7
2.1 +2 +z = 7
2+2+z = 7
z =7-4
z=3
x^2 +y^2 +z^2 = 1+4+9=14(c)
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Jawab: 7.c
Penjelasan dengan langkah-langkah:
2x -y+z =7
x+2y-z=-6 +
3x +y = 1
4x -2y-z=5
2x-y+z =7 +
6x-3y=12 = 2x -y = 4
3x+y = 1
2x-y =4 +
5x =5
x=1
3x+y = 1
3.1 +y = 1
3+y =1
y= -2
2x-y+z =7
2.1 +2 +z = 7
2+2+z = 7
z =7-4
z=3
x^2 +y^2 +z^2 = 1+4+9=14(c)