Помогите плиз алгебра и геометрия пжпж
Ответ:
1. 5x2 + 10x = 0
25x + 10x = 0
35x = 0
x = 0 : 35
x = 0
2. 9x2 - 4 = 0
9x2 = 4
x2 = 4/9
x = 2/3
x = -2/3
3. x2 - 7x + 6 = 0
x2 - x - 6x + 6 = 0
x × (x - 1) - 6 (x - 1) = 0
(x - 1) × (x - 6) = 0
x - 1 = 0
x - 6 = 0
x = 1
x = 6
4. 2x2 + 3x + 4 = 0
4x + 3x + 4 = 0
7x = - 4
x = - 4/7
