142. Решите уравнение: 1) (4 - 5x)(16 + 20x + 25x²) + 5x(5x-2)(5x + 2) = 4; 2) 81(1/3x - 1)(1/9x² + 1/3x + 1) -3x(x - 2)² = 12x².

142. Решите уравнение:

1) \( (4 - 5x)(16 + 20x + 25x^2) + 5x(5x-2)(5x + 2) = 4 \) \( 64 - 125x^3 + 5x(25x^2 - 4) = 4 \) \( 64 - 125x^3 + 125x^3 - 20x = 4 \) \( 64 - 20x = 4 \) \( -20x = -60 \) \( x = 3 \) 2) \( 81(\frac{1}{3}x - 1)(\frac{1}{9}x^2 + \frac{1}{3}x + 1) -3x(x - 2)^2 = 12x^2 \) \( 81(\frac{1}{27}x^3 - 1) - 3x(x^2 - 4x + 4) = 12x^2 \) \( 3x^3 - 81 - 3x^3 + 12x^2 - 12x = 12x^2 \) \( -81 - 12x = 0 \) \( -12x = 81 \) \( x = -\frac{81}{12} = -\frac{27}{4} \)