Answer:
11x²y³ - 4xy²
Explanation:
Distribute the first parenthesis by 1 and the second by - 1
Given
(4x²y³ + 2xy² - 2y) - (-7x²y³ +6xy² - 2y)
= 4x²y³ + 2xy² - 2y + 7x²y³ - 6xy² + 2y ← collect like terms
= (4x²y³ + 7x²y³) + (2xy² - 6xy²) + (- 2y + 2y)
= 11x²y³ + (- 4xy²) + 0
= 11x²y³ - 4xy²