Question

1. What should be added to 2x3 + 6x2 – 5x + 8 to get
3x3 - 2x2 + 6x + 15?​

Answer 1

Answer:

11x - 6

Step-by-step explanation:

2×3 + 6×2 - 5x + 8 = 6 + 12 - 5x +8 = 26 - 5x

Next

3×3 - 2×2 + 6x + 15 = 9 - 4 + 6x + 15 = 20 + 6x

suppose y should be added, then

26 -5x + y = 20 + 6x

y = 11x - 6