Question

1) ( 15 m - n ) ( 125 m² + 15mn + n² )
2) ( 12 x - 13 y ) ( 14 x² + 16 xy + 19y²)

Answer 1

1) = (1/5 m)³ - n³ = 1/125 m³ - n³
2) = (1/2 x)³ - (1/3 y)³ = 1/8 x³ - 1/27 y³

Answer 2

олго мучилась