ANSWERS:

1. (x + 2)² = x² + 4x + 4

2. (2x - 3)² = 4x² - 12x + 9

3. (3x + 4)² = 9x² + 24x + 16

4. (x - y)² = x² - 2xy + y²

5. (2x + 3y)² = 4x² + 12xy + 9y²

Answer:

1.x²

2.-12x

3.16

4.x²

5.12xy