1) x(x+1) = Решение: x=0 и x=-1
2) 0.89x - x^2 = Решение: x(0.89-x) = x=0 и x=0.89
3) 1.2x^2 - 0.3 = Решение: x^2 = 0.3/1.2 = 0.2x = ±√0.2x = ±0.5
4) 121 - 289x^2 = Решение: 289x^2 = 12x^2 = 121/28x = ±√(121/289x = ±(11/17)
1) x(x+1) =
Решение: x=0 и x=-1
2) 0.89x - x^2 =
Решение: x(0.89-x) =
x=0 и x=0.89
3) 1.2x^2 - 0.3 =
Решение: x^2 = 0.3/1.2 = 0.2
x = ±√0.2
x = ±0.5
4) 121 - 289x^2 =
Решение: 289x^2 = 12
x^2 = 121/28
x = ±√(121/289
x = ±(11/17)