помогите с решением(подробным)
объясните что\откуда\как до дискримината
1. 5х^2 - 2х-10 = 2х^2+х+8
2. 14х^2-14х-14 = 2х^2+х+13
3. 4х^2 - 11х +4 = 2х^2+х+10
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