Question

If b = 3, then b -2 is equivalent to _____.

a. -6
b. 1/9
c. 9
d. -9

Answer 1

The answer would be B

Answer 2

Answer: 1/9

Wherever you see 'b', replace it with 3, since b = 3

So,

b^(-2) = 1/(b^2)

b^(-2) = 1/(3^2)

b^(-2) = 1/9