1) (3а + 2b)² = 9a² + 12ab + 4b²

2) (2a² + 3k)² = 4a⁴ + 12a²k + 9k²

3) (4ab + 1)² = 16a²b² + 8ab + 1

4) (6a²+bc²)² = 36a⁴ + 12a²bc² + b²c⁴

5) (2x² + 5y^6z³)⁴ = (2x² + 5y^6z³)² × (2x² + 5y^6z³)² = (4x⁴ + 20x²y^6z³ + 25y¹²z^6)(4x⁴ + 20x²y^6z³ + 25y¹²z^6) =