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is radical -9*-4 = radical -9 * radical -4 ? Justify

  • Math - ,

    √((-9)(-4))
    = √36
    = 6

    or

    √((-9)(-4))
    = (√-9)(√-4)
    =(3i)(2i)
    = 6i^2
    = 6(-1)
    = -6

    so what do you think?

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