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Kyleigh Jacobs

Lvl 10
3y ago
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Wiki User

14y ago

x18 - 1 = (x9 - 1)(x9 + 1). This is a special case of the formula n2 - 1 = (n -1)(n + 1).

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Wiki User

12y ago

18x2 is one term. You need at least two terms to find something in common.

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Q: Factor x to the 18th power - 1?
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