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MHT CET202015 Oct 2020Morning ShiftMathematicsTrigonometric Ratios & IdentitiesActual

If x=3 , y=3 , z=3 , then x²+y²+z²=

Options

  1. A18
  2. B27
  3. C9
  4. D3

Correct answer

C. 9

Step-by-step solution

aligned x²+y²+z² &=9 ² +9 ² ² +9 ² ² &=9 ² +9 ² ( ² + ² ) &=9 ² +9 ² &=9 ( ² + ² )=9 1=9 aligned

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