SOLUTION: please help me to simplify: b+3/b^2 * 3b/b^2-9= (i simplified to : 3b^2+9b/b^4-9b^2, but my teacher marked it incorrect and said to simplify more)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: please help me to simplify: b+3/b^2 * 3b/b^2-9= (i simplified to : 3b^2+9b/b^4-9b^2, but my teacher marked it incorrect and said to simplify more)      Log On


   

Question 544576: please help me to simplify:
b+3/b^2 * 3b/b^2-9=
(i simplified to : 3b^2+9b/b^4-9b^2, but my teacher marked it incorrect and said to simplify more)
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
3b%5E2%2B9b%2Fb%5E4-9b%5E2 u need to add like terms
highlight%283b%5E2-9b%5E2%29%2B9b%2Fb%5E4 shown here
-6b%5E2%2B9highlight%28b%5E1%2Fb%5E4%29cancel a b%5E1 out shown here
highlight%28-6b%5E2%2B9%2Fb%5E3%29 take out 3 shown below
3%28-2b%5E2%29%2B3%283%2Fb%5E3%29
3%28-2b%5E2%2B3%2Fb%5E3%29