Prosze rozwiążcie ten przykład. x(x-8) (x+1) -x (x-2) (x+4) =
x(x-8)(x+1)-x(x-2)(x+4)=
x(x²+x-8x-8)-x(x²+4x-2x-8)=
x(x²-7x-8)-x(x²+2x-8)=
x³-7x²-8x-x³-2x²+8x=
-9x²
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x(x-8)(x+1)-x(x-2)(x+4)=
x(x²+x-8x-8)-x(x²+4x-2x-8)=
x(x²-7x-8)-x(x²+2x-8)=
x³-7x²-8x-x³-2x²+8x=
-9x²