Question 457210
9th rt b^2 * sqrt b^9
I get this
b^2/9 b^9/2=b^2/18 b^9/18
from here I am confused. It shows in help that it is b^85/18. Where are they getting 85.
The next confusion is after this it shows b^4+13/18. Where are they getting 4+13.. 
Can anyone help. It would be wonderful. Thank You

Hi,

b^2/9 b^9/2 should be equal to b^(2/9 +9/2)

2/9 + 9/2 = (2*2 + 9*9)/(9*2)
          = 85/18

Simplifying 85/18, you get 4 + 13/18

Let me know if you need more help.

Warm regards,

Roy