October 2018 1 81 Report
- Completa las siguientes expresiones:

1. (x + y)² = + 2xy +
2. (3m - )² = 9m² - 30mn + 25n²
3. ( + 3n)² = 4m² + 12mn + 9n²
4. ( + 3n)² = 4m² + 12mn + 9n²

5. (2x + 3y)³ = 8x³ + + 54xy²
6. ( 1 - a²)³ = - 3a² + - a⁶
7. (2xy - z²)³ = 8x³y³ + + + z⁶








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