how to factor difference of two squares

Parviz F. answered • 02/23/14

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Use: The identity :

a ^2 - b^2 = ( a+b) ( a -b)

49X^2 - 16 =

(7X ) ^2 - 4 ^2 = ( 7X - 4 ) ( 7X + 4 ) / Here a= 7x, and b = 4.

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