Question

Решите уравнение:
12x^2-5x+(1+3x)(1-3x)-3 (x-2)(x+3)-6 =21

Answer 1

12х^2-5х+1-9х^2-3(х^2+3х-2х-6)-6-21=0
3х^2-5х+1-3х^2-3х+18-27=0
-8х+19-27=0
-8х-8=0
Х+1=0
Х=-1