Thread: lowest common denominator in fraction(help me with this problems)

1-(x/x^2-5+4),(x+1/x^2-16)

2-(6/a6^2-7a+6),(3/a^2-36)

3-(7/x^2+4x+4),(5/4-x^2)

Originally Posted by manznitaa5

1-(x/x^2-5x+4),(x+1/x^2-16) I assume you meant that to be a 5x

2-(6/a^2-7a+6),(3/a^2-36) I might assume you meant a^2 instead of a6^2

3-(7/x^2+4x+4),(5/4-x^2)

1)

First, factor the denominators:



The LCD is found by using all the different factors the most number of times they appear in any one denominator.



2)

Same steps as before. Factor the denominators:





Can you finish? Try #3 and see how far you get.