Iknow how to subtract these fractions, but the one in the problem is throwing me off. anyone know algebra ii?

Answer looks like

   



you can combine 1  with the fraction next to it.
let's move the negative into the numerator so that we do not make mistakes.
make everything addition to make our lives easier. i made a mistake when i did this question and did not address that negative properly.

   

same argument as 5 - 3 = 5 + (-3) or x - y = x + (-y)

1 is really just a fraction too.
to add, we need common denominator. we need to multiply the numerator and denominator of  by  .

   

can combine those fractions on the right

   

the denominators can be factored.

factors to 
factors to

factor those denominators

   

multiply by factors that will make both of them have a common denominator

   
   
they have same denominator. so now combining:

   

expanding  we get

   

and 

plugging these expansions in

   



an alternate way is to do this part first

   

then add the 1 with a common denominator. i still recommend you write it as

   

The year before the 10s so it was like when caveman were alive