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anonymous

  • 5 years ago

find solutions for x: sqrt{x^2-11=5}

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  1. anonymous
    • 5 years ago
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    \[\sqrt{x^2-11=5}\]

  2. anonymous
    • 5 years ago
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    you mean \[\sqrt{x^2-11} =5\] most likely

  3. anonymous
    • 5 years ago
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    sqaure both sides x^2 -11 = 25 x^2 = 36 x= +- 6

  4. anonymous
    • 5 years ago
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    BUT

  5. anonymous
    • 5 years ago
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    it has no solutions

  6. anonymous
    • 5 years ago
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    because if you put either +6 or -6 into the LHS you end up needing to take the sqrt of a negative

  7. anonymous
    • 5 years ago
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    so , has no real solutions

  8. anonymous
    • 5 years ago
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    you need to check your answers by subbing in if you ever have a sqaure root or a logarithm or divide by a variable

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