This is just 15 molecules of C2 or carbon dioxide
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Answer:</h3>
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Explanation:</h3>
Use the FOIL method of multiplying binomials.
First term in each binomial:
Outside terms:
Inside terms:
Last term in each binomial:
Add them all together.
Simplify.
More infomation? like a picture or something
C because t will help you understand what it actual is and you can check your work a is to risky while b your not doing a diagram.