Odpowiedź :
[tex]2.5xy {}^{3} \times ( - 1.4)xy {}^{2} = \\ - 2.5 \times 1.4x {}^{2} y {}^{5 } = \\ - 3.5 x {}^{2} y {}^{5} [/tex]
[tex]2.5xy {}^{3} \times ( - 1.4)xy {}^{2} = \\ - 2.5 \times 1.4x {}^{2} y {}^{5 } = \\ - 3.5 x {}^{2} y {}^{5} [/tex]