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September 20, 2014

September 20, 2014

Posted by **Anonymous** on Tuesday, July 2, 2013 at 8:29pm.

- algebra -
**Joe**, Tuesday, July 2, 2013 at 8:36pmDifference of two squares:

Example: x^2 - 9 factors to (x+3)(x-3)

Perfect squares:

x^2 + 6x + 9 = (x+3)(x+3)

x^2 -6x + 9 = (x-3)(x-3)

Cubes:

x^3 - 27 factors to

(x-3)(x^2 +3x +9)

x^3 + 27 factors to

(x+3)(x^2 -3x +9)

Can you see the pattern?

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