Question

-z² + 13z² - 5z + 7z² - 15z

Answer 1

Answer:

-z^2+13z^2-5z+7z^2-15z

Step-by-step explanation:

= -1 Z^2+13z^2+7z^2-5z-15z

=19z^2- 20z

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Answer 2

Answer:

Take the like terms together

Step-by-step explanation:

-z²+13z²+7z²-5z-15z

19z²-20z