Answer:
Its the last one
Explanation:
(4x⁴ + x³ - x) - (-x⁴ + 3x³ - 2x)
= (4x⁴ + x³ - x) + (x⁴ - 3x³ + 2x)
= 5x⁴ -2x³ + x
8.5m questions
11.1m answers