Question 438304
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Hi
solving by 'factoring' and using the principle of zero products
F	First terms
O	Outside terms
I	Inside terms
L	Last terms
 9x^2-4=0
factoring:   Note:SUM of the outside terms(-6x) and the inside terms(6x) = 0
 (3x+2)(3x-2) = 0
using the principle of zero products
 (3x+2)=0  
   3x = -2       x = -2/3
 (3x-2)=0  
   3x = 2        x = 2/3