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anonymous

  • one year ago

Find the negative square root of 48

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  1. breanna1999
    • one year ago
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    Any answer choices?

  2. anonymous
    • one year ago
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    no

  3. breanna1999
    • one year ago
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    Hmm the one I got is -6.9

  4. anonymous
    • one year ago
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    Ok do you know how you would get that without using a calclutor?

  5. breanna1999
    • one year ago
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    I do not

  6. anonymous
    • one year ago
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    ok thanks

  7. phi
    • one year ago
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    you could factor 48 into its prime factors 2*2*2*2 * 3 and look for "pairs" there are two pairs of "2's". "pull each pair out of the radical, and put only one of each out front: \[ \sqrt{2\cdot 2 \cdot 2 \cdot 2 \cdot 3}= 2\cdot 2 \sqrt{3} \] simplify 2*2 to 4 and we want the negative square root, so make it negative \[ -4 \sqrt{3} \] notice what we get if we multiply it by itself \[ -4 \sqrt{3} \cdot -4 \sqrt{3} = -4\cdot -4 \cdot \sqrt{3} \cdot \sqrt{3} \\ =16 \cdot 3 = 48 \]

  8. anonymous
    • one year ago
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    ok thanks i think i understand now

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