Respuesta :

Hi


It is simple if you use FOIL


(x+5)(x-5) = x*x - 5*x + 5*x - 5*5
                 = x^2 - 5x + 5x  - 25



So you would reach:


[tex](x+5)(x-5)=x^2 - 25[/tex]



Here is the answer.... but you ought to understand how it comes



 If you still need help, just let me know. 



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