Question

x^2+xy+xz=6
y^2+xy+yz=12
z^2+xz+yz=18​

Answer 1

Explicación paso a paso:

x² + xy + xz = 6

y² + xy + yz = 12

z² + xz + yz = 18

x² + y² + z² + 2(xy + xz + yz) = 36

(x+y+z)² = 36

x + y + z = 6