( 2x - 1) (2x + 1) - ( x - 3) (x+1) = 18 Помогите пожалуйста 0 0 Алгебра Answers (1) Filter Sort by: Most Votes Newest FirstOldest FirstRandomRecently Active Keyword Match all Match any Accepted/Unaccepted Show accepted answers only 0 0 Ответ: 4x^2 — 1 — (x^2 + x — 3x — 3) — 18 = 0 4x^2 — 1 — (x^2 — 2x — 3) — 18 = 0 4x^2 — 1 — x^2 + 2x + 3 — 18 = 0 3x^2 + 2x — 16 = 0 D = 4 + 4*16*3 = 196 = 14^2 x1 = ( — 2 + 14)/6 = 12/6 = 2; x2 = ( — 2 — 14)/6 = — 16/6 = — 8/3 = — 2 целых 2/3 Показан 1 результат