Answer:
6x3 + 7x + 4
Step-by-step explanation:
12x^3 - 6x^3 + 12x - 3 - 5x + 7
6x^3 + 7x + 4
Answer:
28-17x
Step-by-step explanation:
12 x 3 - 3(2 x 3 + 4x - 1) -5x + 7
↓
36 - 3(6 + 4x - 1) - 5x + 7
↓
36 - 3(5 + 4x) -5x + 7
↓
36 - 3(5 +4x) - 5x + 7
↓
36 - 15 - 12x - 5x + 7
↓
28 - 12x - 5x
↓
28 - 17x
