Задача №876
Решите уравнение:
а) 8m(1 + 2m) - (4m + 3)(4m - 3) = 2m;
б) х - 3х(1 - 12y) = 11 - (5 - 6x)(6х + 5).
Решение задачи №876:
1876. | a) 8m • (1+ 2m) - (4m + 3)(4m - 3) = 2m => => 8m + 16m2 — (16m2 — 9) = 2m =$¦ 6m + 9 = 0 => =*• 6m= -9 =*• m = -1,5;
6) x - 3x ¦ (1 - 12x) = 11 - (5 — 6z)(6x + 5) => x - 3x + + 36x2 = 11 - (25 - 36.T2) => -2x + 36x2 - 36x2 = 11-— 25 => —2.x = -14 => x = 7.
Оцените это ГДЗ:
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