(0.6+2х)(7х-2.8)=0
0.6+2х=0 или 7х-2.8=0
2х=-0.6 7х=2.8
х=-0.6:2 х=2.8:7
х=-0.3 х=0.4
ОТВЕТ: -0.3 и 0.4
(0.6+2х)(7х-2.8)=0
0.6+2х=0 или 7х-2.8=0
2х=-0.6 7х=2.8
х=-0.6:2 х=2.8:7
х=-0.3 х=0.4
ОТВЕТ: -0.3 и 0.4
18,2х+7.28=0
х=-7.28:18.2
х=-0.4