Решите уровнения Пжжжжжж

1) 3 x^{2} = 0;  x^{2} = 0; x = 0 2) (x + 1)(x-1) = 0; x = 1 x = - 1 3)4 x^{2} - 1 = 0 (2x + 1)(2x - 1) = 0 x = 0.5 x = -0.5 4)3x^{2} = 5x frac{3}{5} x = 1; x = frac{5}{3} . 5)4x^{2} -4x+1=0 (2x - 1)^{2}  = 0; 2x = 1; x = 0.5. 6) x^{2} -16x-17 = 0; x^{2}  - 1 - 16x - 16 = 0; (x+1)(x-1) - 16(x + 1) = 0; (x+1)(x-1-16)=0 x=-1 x=17 7)0.3x² + 5x = 2 0.3x²+5x-2=0 0.3x²+3x+2-2x=0 хз 8)x² - 4x + 5 = 0 (x - 2)² = -1 невозможно