ответ:29
Объяснение:
(2х+1)\х=7
2х+1 = 7x
-5x = -1
x = 1/5
(4х2+1)/х2 = 4*(1/5)2+1 / (1/5)2 = 4/25 + 25/25 / 1/25 = 29/25 : 1/25 = 29 / 1 = 29
