Answer:
Correct choice is (C). [tex]4z^5[/tex].
Step-by-step explanation:
Given expression is [tex]-3z^5-\left(-7z^5\right)[/tex].
Now we need to simplify that then select the correct difference value from the given choices.
[tex]-3z^5-\left(-7z^5\right)[/tex]
negative times negative is positive
[tex]=-3z^5+7z^5[/tex]
Combine like terms because variable z has same exponent.
[tex]=(-3+7)z^5[/tex]
[tex]=4z^5[/tex]
Hence correct choice is (C). [tex]4z^5[/tex].
