👤

1. 5abc + bc - a 2. bxy + 2ab - ay 1. . (2x4 – 5x2 + 4) + (5x3 – 2x2 – 5) 2. (2x3 – 7x2 + 3x – 8) –(6x3 + 3x2 +5x – 7)