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anonymous

  • one year ago

log(base2)x^+x-52=2

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  1. anonymous
    • one year ago
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    \[\log_{2}x ^{2}+x-52=2 \]

  2. anonymous
    • one year ago
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    |dw:1433299192056:dw|

  3. anonymous
    • one year ago
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    |dw:1433299285026:dw|

  4. anonymous
    • one year ago
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    Then I used the quadratic formula to get \[\frac{ -1\pm \sqrt{217} }{ 2}\]

  5. anonymous
    • one year ago
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    But my homework program has rejected all of my answers so I'm at a bit of a loss

  6. sammixboo
    • one year ago
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    You were on the right track at \(\rm \color{purple}{x^2+x-52=4}\)

  7. sammixboo
    • one year ago
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    Give me a minute

  8. sammixboo
    • one year ago
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    Well, now you just want to solve it Oh, and do you know how many solutions you will have?

  9. anonymous
    • one year ago
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    I think that the problem is with the number in the square root.

  10. anonymous
    • one year ago
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    Not exactly, but there's at least one.

  11. sammixboo
    • one year ago
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    Yes, there is 2 solutions for x

  12. sammixboo
    • one year ago
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    Are they asking you to solve for x?

  13. anonymous
    • one year ago
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    Yes, I think I may have figured out the problem. For some reason my calculator was spitting out sqrt(217) but I think it should be Sqrt(225)

  14. sammixboo
    • one year ago
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    Ok, so continue. Can you tell me what you got when you finish?

  15. anonymous
    • one year ago
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    x=7,-8

  16. anonymous
    • one year ago
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    Just checked it in my program and it's correct.

  17. sammixboo
    • one year ago
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    Right :)

  18. anonymous
    • one year ago
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    I can't figure out for the life of me where my calculator came up with 217 instead of 225

  19. sammixboo
    • one year ago
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    There is a few different ways you can solve \(\rm \color{purple}{x^2+x-52=4}\) One way is without square roots I was going to show you :)

  20. sammixboo
    • one year ago
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    Hmm, are you using like a calculator on your computer or..?

  21. anonymous
    • one year ago
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    Yes, so I used a different one which is where I got the correct answer.

  22. sammixboo
    • one year ago
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    Ah ok. You must've used 217 in the past, and it was suggesting this and that. Weird to explain. Clearing your history should work or just use a different calculator for now on :)

  23. anonymous
    • one year ago
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    Yeah, I definitely will. Thanks for your help, sometimes just talking it through helps as much as anything, getting over the block.

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