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March 29, 2017

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If x^3 = 1 and x does not equal 1, x(x+1)= ?

  • Calculus - ,

    Do it in polar:

    x^3=1@0=1@360= 1@720

    x= 1@0 not allowed in the problem statement
    other solutions...
    x= 1@120= 1cos120+i*sin120=you do it.
    x=1@240=1cos240+i*sin240= you do it.

    now, with the last two, solve for x(x+1)
    have fun.

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