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x^2 + 9x + 20 over x^2 -25 divided by x +4 over x - 4

How to do this really confusing i need to simplify the rational expression

  • Math -

    I read that as

    (x2+9x+20)/(x^2-25) ÷ (x+4)/(x-4)
    = (x+4)(x+5)/((x+5)(x-5)) ( x-4)/(x+4)
    = (x-4)/(x-5) , x ≠ ±5,±4

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