Question

simplify (-9v² -8u) + (-2uv -2u² +v²) + (v²+4uv)​
ur intro pls​

Answer 1

Answer:

Here is your answer

Step-by-step explanation:

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Answer 2

Answer:

When stored, it reacts with oxygen to from a layer of magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper for removing this layer so that the underlying metal can be exposed to air.

Step-by-step explanation:

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