Please Help, or Teach me.
i miss this lesson today and
this was the given assignment.

1.) 2a+b a+4b a-7b
___________ - ____________ - ____________
a^2-3ab+2b^2 a^2-4ab+3b^2 a^2-5ab+6a^2

2.) 6m 2n
____________ - ___________
m^2+5m+6 m^2+6m+9

3.) m+2 m
_____ - _____
3m+15 5m+25

Thanks in Advance

Question

Please Help, or Teach me. 
i miss this lesson today and 
this was the given assignment.



1.)    2a+b                    a+4b                     a-7b
   ___________    -   ____________   -  ____________
 a^2-3ab+2b^2  a^2-4ab+3b^2  a^2-5ab+6a^2



2.)      6m                          2n
   ____________    -    ___________
   m^2+5m+6          m^2+6m+9


3.) m+2         m
     _____  -   _____
   3m+15   5m+25

Thanks in Advance

mathstudent55 · Answer

All these problems are similar.
1. The first thing you need to do is to factor every denominator.
2. Then find the LCD.
3. Then multiply each fraction as needed to get the LCD.
4.  Then add or subtract the fractions.
5.  Then collect like terms in the numerator.
6.  Then factor the numerator if possible.
7.  Finally simplify the fraction if possible.