1,24
Объяснение:
(49c^2-9) / (49c^2+42c+9) = (7c-3)(7c+3) / (7c+3)^2= ( 7c-3)/(7c+3)
(7c-3)/(7c+3) pri c=-4
(7(-4)-3) / (7(-4)+3) =(-28-3) / (-28+3) =- 31/-25=1 6/25 = 1,24
1,24
Объяснение:
(49c^2-9) / (49c^2+42c+9) = (7c-3)(7c+3) / (7c+3)^2= ( 7c-3)/(7c+3)
(7c-3)/(7c+3) pri c=-4
(7(-4)-3) / (7(-4)+3) =(-28-3) / (-28+3) =- 31/-25=1 6/25 = 1,24