Question

need help its very very urgent pls
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Answer 1

Answer: 12.5

Step-by-step explanation:

x - y = c

z - x = b

y - z = a

and a^2 + b^2 + c^2 = 25

so just put the values of a, b & c in above equation

(x-y)^2 + (z-x)^2 + (y-z)^2 = 25

2(x^2 + y^2 + z^2 - xy - yz - zx) 25

So, (x^2 + y^2 + z^2 - xy - yz - zx) = 12.5

Thanks!