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Math Help - Why are my answers wrong?

  1. #1
    Member
    Joined
    May 2008
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    Why are my answers wrong?

    1) A quadratic equation in two variables always have two possible solutions in any number system.

    My answer: False, it has no solution when a = 0.

    2) All equations in two variables, such that both variables have maximum exponent as 2 and minimum as zero represents an equation of a circle.

    My answer: False, in equation of a circle, when exponent is 0, (x-h)^0+(y-k)^0=r^2 is not a circle


    3) Find the composition of the function as indicated, find domain of composite function and explain your answer(s).

    f(x) = ( (4x^2) - 2) / (-4 + 8x)
    g(x) = ( (9x^2) -9) / (-12+6x)
    Find fog and fof
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  2. #2
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    Aug 2008
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    Quote Originally Posted by mwok View Post
    1) A quadratic equation in two variables always have two possible solutions in any number system.

    My answer: False, it has no solution when a = 0.

    2) All equations in two variables, such that both variables have maximum exponent as 2 and minimum as zero represents an equation of a circle.

    My answer: False, in equation of a circle, when exponent is 0, (x-h)^0+(y-k)^0=r^2 is not a circle


    3) Find the composition of the function as indicated, find domain of composite function and explain your answer(s).

    f(x) = ( (4x^2) - 2) / (-4 + 8x)
    g(x) = ( (9x^2) -9) / (-12+6x)
    Find fog and fof
    Look at your recent tag for Q3 answer.
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