Respuesta :
difference of 2 perfect squres
if yo have
a^2-b^2 that equals (a-b)(a+b)
x^2-1^2=(x-1)(x+1)
tada
if yo have
a^2-b^2 that equals (a-b)(a+b)
x^2-1^2=(x-1)(x+1)
tada