Find The Value of The Equation

If x = 5, y = 6 and z = -11 then the value of x3 + y3 + z3 is

  1. -890
  2. -970
  3. -870
  4. -990
Anurag Mishra Professor Asked on 21st July 2015 in Maths.
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  • 1 Answer(s)

    Answer: (4) – 990
    Explanation:-
    X = 5 , Y = 6 , Z = – 11
    The value of X3 + Y3 + Z3 = 53 + 63 + (- 11)3
     = 5 x 5 x 5 + 6 x 6 x 6 + (-11) x (-11) x (-11)
    = 125 + 216 – 1331
    = 341 – 1331 = – 990
    Hence, the answer is (4) – 990.

    Anurag Mishra Professor Answered on 21st July 2015.
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