algebra

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what is the square root of -2?\
how would you solve this equation:
square root of -2(square root of -18) + square root of -25?

  • algebra -

    http://www.purplemath.com/modules/complex.htm

  • algebra -

    sqrt(-2) * sqrt(-18) + sqrt(-25).

    sqrt(2*-1) * sqrt(9*2*-1) + sqrt(25*-1)= i*sqrt(2) * 3i*sqrt(2) + 5i =
    3i^2 * 2 + 5i =
    3(-1) * 2 + 5i =
    -6 + 5i.

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