(1.2-x)(x+1.2)+1.8x+x^2=0 решите уравнение

Question

(1.2-x)(x+1.2)+1.8x+x^2=0 решите уравнение

Answer 1

1,2х+1,44-х²-1,2х+1,8х+х²=0
1,44+1,8х=0
1,8х=-1,44
х= -0,8