Verified answer

1) (-2a³b³)³ * (1/2a²b³)² = -8a⁹b⁹ * 1/8a⁴b⁶  = - a¹³b¹⁵

- a¹³b¹⁵ = - a¹³b¹⁵ тождество доказано

2) 2a²b³ = 9

- 6a²b³ = - 3 * 2a²b³ = - 3 * 9 = -27

3) a²b³ = 9 : 2 = 4,5

a⁴b⁶ = (a²b³)² = 4,5² = 20,25

2a⁴b⁶ = 2 * 20,25 = 40,5