Question

Решите уравнение
18(х в квадрате)-(9х+2)(2х-1)=1

Answer 1

18х²-(9х+2)(2х-1)=1
18х²-(18х²-9х+4х-2)=1
18х²-18х²+9х-4х+2=1
9х-4х=1-2
5х=-1
х=-1:5
х=-0.2