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Geological history

Geological history describes geological events that account for the straitigraphy[?], petrology[?] and structure (see structural geology) seen in rocks or earth materials.

See geologic timescale.



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Quadratic formula

... a quantity that does not depend on x) to the expression to the left of "=", that will make it a perfect square trinomial of the form x2 + 2xy + y2. Since "2xy" in this ...

 
 
 
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