1) (a + 2)² = a² + 4a + 4
2) (6 - x)² = 36 - 12x + x²
3) (\frac{1}{2}a + b)² = \frac{1}{4}a² + ab + b²
4) (3x - 4)² = 9x² - 24x + 16
5) (5m + 3n)² = 25m² + 30mn + 9n²
6) (0,1a + 10b)² = 0,01a² + 2ab + 100b²
7) (6x - \frac{1}{3}y)² = 36x² - 4xy + \frac{1}{9}y²
8) (n² + 1)² = n⁴ + 2n² + 1
9) (x⁴ - x²)² = x⁸ - 2x⁶ + x⁴
10) (y² + y³)² = y⁴ + 2y⁵ + y⁶
11) (-3a + 4b³)² = 9a² - 24ab³ + 16b⁶
12) (-2 - 5x)² = 4 + 20x + 25x²
13) (\frac{1}{3}m + 3\frac{3}{5}n)² = (\frac{1}{3}m + \frac{18}{5}n)² = \frac{1}{9}m² + \frac{12}{5}mn + \frac{324}{25}n²
14) (6ab² - a²b)² = 36a²b⁴ - 12a³b³ + a⁴b²
15) (5a⁴ - 2a²b⁴)² = 25a⁸ - 20a⁶b⁴ + 4a⁴b⁸