Question

Which expression is equal to
-18b^-4

Answer 1

`- \frac{18}{ {b}^(4) }`

Explanation:

`- 18b {}^( - 4)`

express b^-4 with a positive exponent using:

`a {}^( - n) = \frac{1}{ {a}^(n) }`

`- 18 \frac{1}{ {b}^(4) }`

`- \frac{18}{ {b}^(4) }`