Question

Select the correct difference. -3z 5 - (-7z 5) (A)-10z5 (B)-4z5 (C)4z5 (D)4z

Answer 1

Answer:

Correct choice is (C). $4z^5$.

Step-by-step explanation:

Given expression is $-3z^5-\left(-7z^5\right)$.

Now we need to simplify that then select the correct difference value from the given choices.

$-3z^5-\left(-7z^5\right)$

negative times negative is positive

$=-3z^5+7z^5$

Combine like terms because variable z has same exponent.

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

$=4z^5$

Hence correct choice is (C). $4z^5$.