1) x(x+1) = 0Решение: x=0 и x=-1
2) 0.89x - x^2 = 0Решение: x(0.89-x) = 0x=0 и x=0.89
3) 1.2x^2 - 0.3 = 0Решение: x^2 = 0.3/1.2 = 0.25x = ±√0.25x = ±0.5
4) 121 - 289x^2 = 0Решение: 289x^2 = 121x^2 = 121/289x = ±√(121/289)x = ±(11/17)
1) x(x+1) = 0
Решение: x=0 и x=-1
2) 0.89x - x^2 = 0
Решение: x(0.89-x) = 0
x=0 и x=0.89
3) 1.2x^2 - 0.3 = 0
Решение: x^2 = 0.3/1.2 = 0.25
x = ±√0.25
x = ±0.5
4) 121 - 289x^2 = 0
Решение: 289x^2 = 121
x^2 = 121/289
x = ±√(121/289)
x = ±(11/17)