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(x-3)^2-(x+2)*(x-2)+(x+1)^2,va rog!

Răspuns :

[tex](x-3)^2-(x+2)(x-2)+(x+1)^2= \\ =x^2-2 \cdot x \cdot 3 +3^2-x^2+4+x^2+2 \cdot x \cdot 1+1^2= \\ =x^2-6x+9-x^2+4+x^2+2x+1=x^2-4x+14[/tex]