Answers

2014-08-03T14:30:31+08:00
Example: (x+y)²

(x+y)(x+y)

shortcut:
[(x²)+(y²)+(2)xy]

2 there is constant you should multiply that to the numerical coefficient of x and y
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2014-08-03T14:30:56+08:00
The difference of squares, sum of cubes, difference of cubes

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