Question

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Answer 1

Answer:

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Answer 2

Answer:

The simplified expression is 2y^2-z^2+2yz

Step-by-step explanation:

There are only 2 like terms in this expression; 3yz and -yz. 3yz plus -yz=2yz. So, just input that into the expression, you get 2y^2-z^2+2yz. Hope this helps!