Answers

2014-07-11T19:07:54+08:00
To factor "Difference of two squares" :
Example: 
                              x²-4
∞ Get the square root of the first term and last term,then write it as two factors with opposite signs (one negative and one positive)
                       √x² = x and √4 = 2
                            (x-2)(x+2)

P.S. Hope that helps ^_^

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2014-07-12T14:19:52+08:00
Difference of two squares= its factors is sum and and difference of 2 same terms.

Ex.

x²-9

(x+3) (x-3)

the additionsame is always in the first
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