-3((b)^-2)+6=-6 I can find the answer on an online calculator but i would very much like to know how to do find b via step by step
Use SAMDEB (Subtraction/Addition, Multiplication/Division, Exponents, Brackets, Repeat if necessary after brackets removed)
In this case
subtract 6 on both sides
divide by -3 on both sides
Multiply both sides by b^{-2} and divide by 4
Take the square root on both sides (Exponents)
Recall the fact that since the square root is also a power (of ) and hence