Question

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

Answer 1

$(x-3)^2-(x+2)(x-2)+(x+1)^2= \\ =x^2-2 \cdot x \cdot 3 +3^2-x^2+4+x^2+2 \cdot x \cdot 1+1^2= \\ =x^2-6x+9-x^2+4+x^2+2x+1=x^2-4x+14$