Question

(2-x)^2-(2x+1)(2+x)+(3+x)^2=(x-1)(4-x)-x(1-x)+1 DAU CORONITA !!!

Answer 1

(2-x)^2-(2x+1)(2+x)+(3+x)^2=4-4x+x^2-(4x+2x^2+2+x)+9+6x+x^2=13+2x+2x^2-4x-2x^2-2-x=9-3x=3(3-x)