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ihatealgebrasomuch

  • 4 years ago

-√80 how do i do this?

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  1. dunn0053
    • 4 years ago
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    I assume you just need to factor it out so the best way to do it is figure out a multiple that's a perfect square and then it's just a multiple of that and the square root of the other number, such as squrt(125) is 5 * squrt(5) since 125 = 5 * 25.

  2. ihatealgebrasomuch
    • 4 years ago
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    well the instructions say that i need to simplify and that all vaiables need to represent nonnegative numbers...

  3. ihatealgebrasomuch
    • 4 years ago
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    so how do i take the negative away?

  4. dunn0053
    • 4 years ago
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    Take out the multiple of sqrt(1) which is the imaginary unit, i as a multiple of your simplified answer, my friend.

  5. ihatealgebrasomuch
    • 4 years ago
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    im so confused

  6. phi
    • 4 years ago
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    If this is \[ -\sqrt{80} \] then the best you can do is factor out a perfect square 80 = 16*5 or 4^2 * 5 so you get \[-\sqrt{16*5} =-4\sqrt{5} \]

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