Question

Select the correct difference. -3z 7 - (-5z 7) 2z7 8z14 -2z7 2z

Answer 1

-3z^7 - (-5z^7) = -3z^7 + 5z^7 = 2z^7

Answer 2

`2z^(7))`.

Explanation:

Given :
`-3 z^(7) - ( -5 z^(7))`

To find : Select the correct difference.

Solution : we have given

`-3 z^(7) - ( -5 z^(7))`.

Open the parenthesis

`-3 z^(7) + 5 z^(7))`.

By the rule ( + - = -) .

`2z^(7))`.

Therefore,
`2z^(7))`.