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anonymous

  • 5 years ago

4x+5 42x+10 ____________ x^2-x-5

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  1. anonymous
    • 5 years ago
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    What is the numerator?

  2. anonymous
    • 5 years ago
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    do you want to simplify it?

  3. anonymous
    • 5 years ago
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    Sorry....typing is in a second

  4. anonymous
    • 5 years ago
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    *it*

  5. anonymous
    • 5 years ago
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    I think it's 4x + 542x + 10/ x^2 - x -5

  6. anonymous
    • 5 years ago
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    4x3 + x2 + 17x – 15 is the numerator and -x2 – x – 5 is the denominator

  7. anonymous
    • 5 years ago
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    Long Division

  8. anonymous
    • 5 years ago
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    Write it like a long division problem.. The 4x^3 part on the inside. You ask yourself -x^2 times what gives you 4x^3 that answer is -4X so that is what you put above the 4x^3 in the answer. This is step 1.

  9. anonymous
    • 5 years ago
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    Once you put -4x up on top.. you multiply it by every term in (-x^2 - x - 5) so under the 4x^3 you write 4x^3 + 4x^2 + 20x You get that by -4x(-x^2 - x - 5) change all the signs on the bottom because you want to subtract so on the bottom you get -4x^3 - 4x^2 - 20x draw your line under this and add them up

  10. anonymous
    • 5 years ago
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    the 4x^3 and the -4x^3 add to 0 so you don't write that down. the x^2 - 4x^2 should give you -3x^2 the 17x - 20x should give you -3x then bring down the next term (-15) you should see -3x^2 - 3x - 15 on the bottom

  11. anonymous
    • 5 years ago
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    Then you ask yourself -x^2 times what give you -3x^2 (just like the first step) The answer is 3 so you write + 3 up in your answer next to your -4x Once you write +3 then you "distribute" with the (-x^2 - x - 5) and you write down "on the bottom" -3x^2 - 3x - 15 because we are subtracting.. change all of the signs 3x^2 + 3x + 15 and draw a line add them up.. you should get all zeros. So your answer is -4x + 3 that means (-4x + 3) times (-x^2 - x - 5) = your original 4x^3 + x^2 + 17x + 15

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