Question

find the answer.....​

Answer 1

Answer:

17 is the correct answer please brainliest

Answer 2

We know that

${(x + y - z)}^{2} = {x}^{2} + {y}^{2} + {z}^{2} 2(xy + yz + xz)$

Given

x+y - z = 4

x^2+ y^2 - z^2 = 50

so on putting in formula we get

${4}^{2} = 50 + 2(xy + yz - zx)$

xy + yz - zx = -34/2

xy + yz - zx = -17