1) Решение:x(2x+1.2)(x+9) = 0x = 0, x = -0.6, x = -9
2) Решение:0.5x - 5(0.3x + 0.2) = 0.5(x-1)*0.80.5x - 1.5x - 1 = 0.4x - 0.8-1x - 1 = 0.4x - 0.8-1x - 0.4x = -0.8 + 1-1.4x = 0.2x = 0.2 / -1.4x = -0.142857
3) Решение:26 - 4x = 3x - 7(x-3)26 - 4x = 3x - 7x + 2126 - 4x = -4x + 2126 = -4x + 214x - 4x = 26 - 210 = 5
Уравнение не имеет решения.
1) Решение:
x(2x+1.2)(x+9) = 0
x = 0, x = -0.6, x = -9
2) Решение:
0.5x - 5(0.3x + 0.2) = 0.5(x-1)*0.8
0.5x - 1.5x - 1 = 0.4x - 0.8
-1x - 1 = 0.4x - 0.8
-1x - 0.4x = -0.8 + 1
-1.4x = 0.2
x = 0.2 / -1.4
x = -0.142857
3) Решение:
26 - 4x = 3x - 7(x-3)
26 - 4x = 3x - 7x + 21
26 - 4x = -4x + 21
26 = -4x + 21
4x - 4x = 26 - 21
0 = 5
Уравнение не имеет решения.