is -2 a composite number? why/ why not? it has more than 2 factors(1,2,-1,-2)
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Step-by-step explanation:
Echinoderms are animals that you must be knowing. If you know a starfish, then you are well aware of what an echinoderm is. Echinoderms are animals that are invertebrates. The name actually means spiny skin! All the animals in this phylum exhibit spiny skin and hence are grouped together. Let us find out more about them.
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