Algebra-1

Step 1: Distribute the parentheses.
(5a²b − 3ab² +2b²) + (4a²b + 6ab² − 3b²) is the same as 5a²b − 3ab² +2b² + 4a²b + 6ab² − 3b².

Step 2: Combine like terms.
Combine the terms with a²b: 5a²b + 4a²b = 9a²b.

Combine the terms with ab²: -3ab² + 6ab² = 3