Question

корень 1/9-2x= 0,4 хелп

Answer 1

(√1/(9-2х))²=0,4²
1/(9-2х)=0,16
(9-2х)*0,16=1
1,44-0,32х=1
-0,32х=1-1,44
-0,32х=-0,44
х=1,375

Answer 2

там 1/(9-2

Answer 3

(9-2x)