1) 3x^2=0 2) (x+1)(x-1)=0 3) 4x^2-1=0 4) 3x^2=5x 5) 4x^2-4x+1=0 6) x^2-16x-17=0 7) 0,3x^2+5x=2 8) x^2-4x+5=0

1) 3x^2 = 0;x^2 = 0;x = 0.Ответ: 0.2) (x + 1)(x - 1) = 0;x^2 - 1^2 = 0;x^2 - 1 = 0;x^2 = 1;x = +-1.Ответ: -1, 1.3) 4x^2 - 1 = 0;4х^2 = 1;x^2 = 1/4;x = +-1/2.Ответ: -1/2, 1/2.4) 3x^2 = 5x;3x^2 - 5x = 0;x(3x - 5) = 0;x = 0 или 3х - 5 = 0;3x = 5;x = 5/3.Ответ: 0 или 5/3.5) 4x^2 - 4x + 1 = 0;D = 16 - 4 * 4 = 0;x = 4/8;x = 1/2.Ответ: 1/2.6) x^2 - 16x - 17 = 0;D = 256 - 4 * (-17) = 256 + 68 = 324;x = (16 +- 18)/2;x1 = 34/2 = 17;x2 = -2/2 = -1.Ответ: -1, 17.7) 0,3x^2 + 5x = 2;0,3х^2 + 5x - 2 = 0;D = 25 - 4 * 0,3 * (-2) = 25 + 2,4 = 27,4;x = (-5 +- sqrt27,4)/0,6.Ответ: (-5 +- sqrt27,4)/0,6.8) x^2 - 4x+ 5 = 0;D = 16 - 4 * 5 = -4 < 0.Ответ: нет решений.