Potrzebuje na teraz, daje naj! Matma 2 liceum


[tex]punkt.2.1.\\\\(x+6)^2-(2x-3)^2=x^2+12x+36-(4x^2-12x+9)=\\\\=x^2+12x+36- 4x^2+12x-9=-3x^2+24x+27=-3(x^2-8x-9)=\\\\= -3(x^2-8x-x+x-9)= -3(x^2-9x +x-9)=-3[x(x -9)+(x-9)]=\\\\=-3 (x+1)(x-9) \\\\odp.\ \ B[/tex]