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|x +b| = c
- -b is the centerpoint
- x is exactly c units away from b
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|x + b| < c
- -b is the centerpoint
- x is less than c units away from the centerpoint, -b
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with fractions rx blank as x blank
rx decreases as x increases
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(a2 - b2 ) =
(a + b)(a - b)
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(n2 - 1)
- = (n2 - 1)
- = (n2 - 12 )
- = (n + 1)(n - 1)
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n(n2 - 1)
- = n(n2 -1)
- = n(n2 -12 )
- = n(n+1)(n-1)
- = (n-1)n(n+1)
- 3 consecutive integers
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Primes 11-20
31, 37, 41, 43, 47, 53, 59, 61, 67, 71
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First 10 primes
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
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