4a 2 6ab 9b 2 )( 2a 3b July 8, 2019 16 32 64 128 (4 - 4a)/(3a + 9b) * (a ^ 2 + 6ab + 9b ^ 2)/(2 - 2a) при a = 6 и b = 2 4/(3a + 2b) - 2/(2b - 3a) + (8b)/(4b ^ 2 - 9a ^ 2) 4 6a-2 6(a-2b)-4 2b
