How do you solve: 81 X 9^ (-2b-2) = 27

b=-0.75

If the X means times then this is your answer

Step 1: Divide both sides by 81.

Step 2: Solve Exponent.

b=-0.75

Did you mean

81 * 9∧ (-2b-2) = 27 = > First divide whole equation with 81 and get

(3∧2) ∧ (-2b-2) = 1/3 = > 3∧ (-4b-4) = 3∧ (-1) = > - 4b-4=-1 = > - 4b = - 1+4 = > - 4b=3 = >

we will multiply whole equation with (-1) and get 4b=-3 = > b = - (3/4)

If the start item is correct.

Good luck!