If x + y + z = 0 and x 2 + y 2 + z 2 = 40, then what is the value of xy + yz + zx?

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SSC CGL 2022 objective Ques (71 results)

71)

If x + y + z = 0 and x² + y² + z² = 40, then what is the value of xy + yz + zx?

SSC CGL 2022

A)

-5

B)

5

C)

-20

D)

-10

Answer

Correct Option: C

-20

Hint::

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