(x-y) elevado al cuadrado= 1
b.(a+b+c) (a-b+c)= 0
=)
A) ( 1 - 2 )^2
(-1)^2
= 1
B) ( -1 + 0 + - 2 ) ( -1 + 0 --2)
(-3)(1)
=3
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(x-y) elevado al cuadrado= 1
b.(a+b+c) (a-b+c)= 0
=)
A) ( 1 - 2 )^2
(-1)^2
= 1
B) ( -1 + 0 + - 2 ) ( -1 + 0 --2)
(-3)(1)
=3