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Sif
Sif asked in Science & MathematicsMathematics · 9 years ago

Math Help! Reducing rational expressions?

n^2 - 64

___________

2n^2 + 15n - 8

and

x^2 + 7x + 10

____________

x^2 + 9x + 14

Update:

Thanks everyone!

5 Answers

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  • moe
    Lv 7
    9 years ago

    n^2 - 64

    ___________

    2n^2 + 15n - 8

    =(n+8)(n-8) / (2n-1)(n+8) = (n-8) / (2n-1) <= ans1

    and

    x^2 + 7x + 10

    ___________

    x^2 + 9x + 14

    = (x+2)(x+5) / (x+7)(x+2) = (x+5) / (x+7) <= ans2

  • Salbal123
    9 years ago

    1. (n-8)(n+8)

    2. (2n-1)(n+8)

    3. (x+5)(x+2)

    4. (x+7)(x+2)

  • Ronen Wdowinski
    Lv 6
    9 years ago

    (n + 8)(n - 8)

    ——————

    (2n - 1)(n + 8)

    n - 8

    ———

    2n - 1

    (x + 5)(x + 2)

    ——————

    (x + 7)(x + 2)

    x + 5

    ——–

    x + 7

  • ?
    Lv 7
    9 years ago

    Factor them

    (n - 8)(n + 8)

    ----------------------

    (2n - 1)(n + 8)

    Now you can cancel out the (n + 8)'s, leaving you with:

    n - 8

    ----------

    2n - 1

    Think you can get the second one?

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  • Sadf K
    9 years ago

    expotiential

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