Greatest common factor, Mathematics

x4 - 25

There is no greatest common factor here.  Though, notice that it is the difference of two perfect squares.

x4 - 25 = ( x2 )2  - (5)2

Thus, we can employ the third special form from above.

x4 - 25 =( x2 + 5)(x2 - 5)

Posted Date: 4/6/2013 2:50:21 AM | Location : United States







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