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Math Help - logarithmic and exponential problems

  1. #1
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    logarithmic and exponential problems

    I cannot remember how to do this . any help would be appeciated.
    logx - log(x+3) = -1
    also 3^(x^2+4x)=27 Please help me! Thank You!
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by hdrag02 View Post
    I cannot remember how to do this . any help would be appeciated.
    logx - log(x+3) = -1
    also 3^(x^2+4x)=27 Please help me! Thank You!
    \log x- \log(x+3)=-1

    \log \frac{x}{x+3}=-1

    10^{-1}=\frac{x}{x+3}

    Can you finish??

    3^{x^2+4x}=27

    3^{x^2+4x}=3^3

    x^2+4x=3

    Can you finish?
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  3. #3
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    I think i have the right answer, but it seems weird. Heidi
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  4. #4
    A riddle wrapped in an enigma
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    Quote Originally Posted by hdrag02 View Post
    I think i have the right answer, but it seems weird. Heidi
    What is it and we'll see how weird it is?
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  5. #5
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    Hdrag02 problem

    is the answer 1/3? for the first problem and -2 + or - the sq root of 7 for the other? I just feel like an idiot. Heidi
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  6. #6
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    Quote Originally Posted by hdrag02 View Post
    is the answer 1/3? for the first problem and -2 + or - the sq root of 7 for the other? I just feel like an idiot. Heidi
    Don't know why you feel that way. Your answers are correct!!
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  7. #7
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    thank you!

    Thank You soooooo Much! I really appreciated your help. I will be back! Heidi
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  8. #8
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    exponential problem# 2

    Is there any way you can send me your answer? I was told I had the wrong answer. My Professor had x^2+4x=-3. I am confused. could you explain this to me? Thank you.Heidi
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