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X+y+z=0 then proved x cube +y cube +Z cube is equal to 3 x y z

    • Posted by Mohd Affan 6 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Mohd Affan 6 years, 8 months ago

    X+y+z=0 X+y=-z Cubing both sides (X+y)cube=(-z)cube X cube +y cube +3xy(x+y)= (-z) cube X cube + y cube+ 3xy(-z)=(- z) cube X cube + y cube-3xyz=(-z) cube X cube + y cube + z cube= 3xyz

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