SOLUTION: i really need help with this problem because I can't figure out what the LCD is. Add or subtract as indicated 7b+6/6b-36 - b+2/b-6 The answer is 1/?

Algebra ->  Expressions-with-variables -> SOLUTION: i really need help with this problem because I can't figure out what the LCD is. Add or subtract as indicated 7b+6/6b-36 - b+2/b-6 The answer is 1/?      Log On


   

Question 311365: i really need help with this problem because I can't figure out what the LCD is.
Add or subtract as indicated 7b+6/6b-36 - b+2/b-6
The answer is 1/?
Found 2 solutions by JBarnum, ankor@dixie-net.com:
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
well first factor everything u can
%28%287b%2B6%29%2F%286%28b-6%29%29%29-%28%28b%2B2%29%2F%28b-6%29%29
LCD=6(b-6)
%28%287b%2B6%29%2F%286%28b-6%29%29%29-%28%286%28b%2B2%29%29%2F%286%28b-6%29%29%29


Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Add or subtract as indicated 7b+6/6b-36 - b+2/b-6
:
%287b%2B6%29%2F%286b-36%29 - %28b%2B2%29%2F%28b-6%29
Factor out 6 in 1st denominator, results:
%287b%2B6%29%2F%286%28b-6%29%29 - %28b%2B2%29%2F%28b-6%29
the common denominator is 6(b-6), therefore
%28%287b%2B6%29-6%28b%2B2%29%29%2F6%28b-6%29 = %287b+%2B+6+-+6b+-+12%29%2F6%28b-6%29
Group like terms
%287b+-+6b+%2B+6+-+12%29%2F6%28b-6%29 = %28b+-+6%29%2F6%28b-6%29
Cancel the (b-6)'s and you have
1%2F6