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Descompuneti in factori

 

E(x)=4(x+1)la 2 - (2-x)la 2



Răspuns :

=4(x²+2x+1)-(2²-4x+x²)
=4x²+8x+4-4+4x-x²=
=3x²+12x
=3x(x+4)
4(x²+2x+1)-(4-4x+x²) = 4x²+8x+4-4+4x-x²) = 3x²+12x =3x(x+4)