Math, asked by tasneemrahman1976, 3 months ago

b. Simplify: -3z2 + 15z2 - 7z + 9z2 - 21z.

Answers

Answered by sumaiya298

1

Answer:

21z²-28z

Step-by-step explanation:

-3z²+15z²-7z+9z²-21z

15z²+9z²-3z²-7z-21z

21z²-28z

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