cuddlesxwheretho
cuddlesxwheretho cuddlesxwheretho
  • 24-04-2020
  • Mathematics
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How to add/subtract with polynomial denominators?
He gave us the answer but I don’t know how to solve
:\

How to addsubtract with polynomial denominators He gave us the answer but I dont know how to solve class=

Respuesta :

valleybritney
valleybritney valleybritney
  • 24-04-2020

Answer:

Step-by-step explanation:

  • Cross multiply the numerators by the denominators.

[tex]\frac{5n}{n-2} -\frac{5}{n-1} =\frac{5n(n-1)-5(n-2)}{(n-2)(n-1)}[/tex]

  • Foil out the numerator:

[tex]\frac{5n}{n-2} -\frac{5}{n-1} =\frac{5n(n-1)-5(n-2)}{(n-2)(n-1)}=\frac{5n^{2}-5n-5n+10 }{(n-2)(n-1)}[/tex]

  • Simplify!

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