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anonymous

  • one year ago

What is NOT a restriction of the quotient of quantity 3 x squared plus 12 x plus 9 divided by quantity x squared minus 4 divided by quantity 4 x plus 4 divided by quantity x plus 2?

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  1. e.mccormick
    • one year ago
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    Restrictions are generally invalid things, like negatives under a root or 0 on the botton of a fraction. So find out where the bottom would be 0 and that is the restriction.

  2. anonymous
    • one year ago
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    how do i do that?

  3. anonymous
    • one year ago
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    hllo?

  4. e.mccormick
    • one year ago
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    First, write it out with numbers, letters, and fractions sighs rather than words. Then, factor anything that would be the bottom of a fraction. If it is a 0, then it is restricted. \(\dfrac{{\dfrac{a}{b}}{\dfrac{c}{d}}\) In that: if b is 0, the top fraction is invalid; if d is 0, the bottom fraction is invalid; if c is 0, the bottom of the big fraction is invalid. So in that example, there are three things that can make it invalid. You can do something similar with your question once it is written out that way.

  5. e.mccormick
    • one year ago
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    Oops... \(\dfrac{\dfrac{a}{b}}{\dfrac{c}{d}}\)

  6. e.mccormick
    • one year ago
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    [(3x^2 + 12x + 9)/(x^2 - 4)]/[(4x + 4)/(x + 2)] So, any place (x^2 - 4), (4x + 4), or (x + 2) is = 0 is undefined. Each of those would make the bottom of the fraction into 0, which breaks rules.

  7. anonymous
    • one year ago
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    \[x \neq1\] is that right ?

  8. e.mccormick
    • one year ago
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    -1 is undefined, so restricted. THat is the 4x+4 one. 4(-1)+4 = ? -4+4 = ? 0 = 0

  9. anonymous
    • one year ago
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    oh so it would be -1?

  10. e.mccormick
    • one year ago
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    -1 is a restriction so it is not the answer.

  11. e.mccormick
    • one year ago
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    If you find the three restrctions then you can pick what is left over as an answer... OR you can put in all the answers and see which one works.

  12. e.mccormick
    • one year ago
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    Another way to check this sort of question is with a graphing tool. However, you need to know the math so that you can get the answer when there is no tool availble.

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