Math precalc log question?

Solve: Log12 (x^2-x)=1

The 12 is subscript I cannot do this on my phone. Thank you for your input!! I always give a best answer.

2 Answers

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  • 9 years ago

    I usually use the underscore to indicate subscripts, including log bases.

    log_12 (x^2 - x) = 1

    x^2 - x = 12^1 [remembering that a logarithm is an exponent]

    x^2 - x - 12 = 0

    (x - 4) (x + 3) = 0

    This has solutions

    x=4 and x= -3

  • Anonymous
    4 years ago

    a) 2InX + 3In((x^0.5)y) =InX^2 + In((x^0.5)y)^3 =ln(X^2*((x^0.5)y)^3) =ln (X^(7/2)*Y^3) b)2In (3x+6) = 6 In (3x+6) = 3 3x+6=e^3 x=(e^3-6)/3 c)e^((x-2)^2) = 2 (x-2)^2 * lne =ln2 x-2= + or - sqrt(ln2) x=+ or - sqrt(ln2)+2 d) 7^(-2x) = 3 -2x ln 7=ln3 x= - ln3/2ln7

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