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Evaluate y^2 + 2y for y = 0, 1, and 2. Are the resulting numbers prime or composite.
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Evaluate y^2 + 2y for y = 0, 1, and 2. Are the resulting numbers prime or composite.
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Apr 3, 2016
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Evaluate y^2 + 2y for y = 0, 1, and 2. Are the resulting numbers prime or composite.
Mathematics
middle-school
Ian Bjorhovde
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Ian Bjorhovde
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y = 0:
0 is neither prime nor composite.
y=1:
3 is a prime number (because only 3 and 1 divide evenly into it)
y = 2:
8 is a composite number (because multiple different numbers divide evenly into it: 1, 2, 4, and 8)
Tsohtan
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Apr 8, 2016
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Tsohtan
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