Помогите с решением пж. срочно
(a²-9b²)/3ab : (1/3b - 1/a) = (a-3b)(a+3b)/3ab * 3ab/(a-3b)=a+3b a=2 2/17 b = 9 5/17 3b=3* 9 5/17 = 27 15/17 a+3b= 2 2/17 + 27 15/17 = 29 17/17 = 30
(a²-9b²)/(3ab)*(3ab)/(a-3b)=(a²-9b²)/(a-3b)=(a-3b)*(a+3b)/(a-3b)=(a+3b): а=2целых2/17=(2*17+2)/17=36/17; в=9целых5/17=(9*17+5)/17=158/17; (a+3b)=36/17+3*158/17=36/17+474/17=510/17=30