1) -5х( - 6х² + 3) = 30х^3-15х
2) (х + 4)(3х – 2) = 3х^2+10х-8
3) (6а + 5в)(7а - 3в) = 42а^2+17ав-15в^2
1) -5х( - 6х² + 3) = 30х^3-15х
2) (х + 4)(3х – 2) = 3х^2+10х-8
3) (6а + 5в)(7а - 3в) = 42а^2+17ав-15в^2