-2(z-4)+5(z-4)= (a-1)²-(2a-1)²+2(a-2)(a+2)= (-z-y)²-4(3x-2)(-2-3x)= jak najszybciej (: xD

-2(z-4)+5(z-4)=-2z+8+5z-20=3z-12 (a-1)²-(2a-1)²+2(a-2)(a+2)=a²-2a+1-(4a²-4a+1)+2a²-8=a²-2a+1-4a²+4a-1+2a²-8=-a²+2a (-z-y)²-4(3x-2)(-2-3x)=z²+y²-2zy-4*(-6z-9x²+4+6x)=z²+y²-2zy+24z+36x²-16-24x

-2(z-4)+5(z-4)=-2z+8+5z-20=3z-12 (a-1)*-(2a-1)*+2(a-2)(a+2)=(a*-2a+1)-(4a*-4a+1)+2(a-2)* =(a*-2a+1)-(4a*-4a+1)+2(a*-4+4=(a*-2a+1)-(4a*-4a+1)+2a*-8+8=a*-2a+1-4a*+4a-1+2a*-8+8=-a*+2a (-z-y)*-4(3x-2)(-2-3x)= z*-2zy+y*-4(3x-2)(-3x-2)= z*-2zy+y*-4(-9x*-6x+6x+4)= z*-2zy+y*+36x*+24x-24-16= z*-2zy+y*+36x*+24x-40 * => do potegi