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If x + y + z = 10, x^3+y^3+z^3=75 and xy...

If x + y + z = 10, `x^3+y^3+z^3=75` and xyz = 15, then find the value of `x^2+y^2+z^2 -xy-yz-zx`
यदि x + y + z = 10, `x^3+y^3+z^3=75` तथा xyz = 15 है, तो `x^2+y^2+z^2 -xy-yz-zx` का मान ज्ञात कीजिए।

A

6

B

3

C

5

D

4

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