The question is on the image! one question, , i don't know how to do

1/4 b^-3/2  - 1/2 b^(-5)

Step-by-step explanation:

b^1/2 - 2 b^-3

4b^2

Separating into two fractions

b^1/2            2 b^-3

  --  

4b^2           4b^2

Remember when dividing exponents with the same base, we  subtract them

1/4 b^(1/2 -2)   - 2/4 b^(-3-2)

1/4 b^-3/2  - 1/2 b^(-5)

use google you idiot omg you're so annoying

step-by-step explanation: