Question

Which expressions
are
equivalent to 4-2.7-2 ?

Answer 1

I think it’s A (4x7)-2

Answer 2

The equivalent of the expression
`4^(-2) * 7^(-2)` are (b) and (c)

How to determine the equivalent of the expression

From the question, we have the following parameters that can be used in our computation:

`4^(-2) * 7^(-2)`

Applying the law of indices, we have

`4^(-2) * 7^(-2) = (1)/(4^2) * (1)/(7^2)`

Evaluate

`4^(-2) * 7^(-2) = (7^(-2))/(4^2)`

Lastly, we have

`4^(-2) * 7^(-2) = (1)/(28^2)`

Hence, the equivalent of the expression are (b) and (c)