Question

помогите решить, пожалуйста
даю 20б​

Answer 1

Ответ:

${x}^{2} - x = 0 \\ x(x - 1) = 0 \\ x1 = 1 \\ x2 = 0$

${4x}^{2} - 8x = 0 \\ {x}^{2} - 2x = 0 \\ x(x - 2) = 0 \\ x1 = 2 \\ x2 = 0$

${x}^{2} - 25 = 0 \\ {x}^{2} - {5}^{2} = 0 \\ x1 = 5 \\ x2 = - 5$

${4x}^{2} - 2x = 0 \\ {2x}^{2} - x = 0 \\ {x}^{2} - \frac{1}{2} x = 0 \\ x(x - \frac{1}{2} ) = 0 \\ x1 = 0.5 \\ x2 = 0$

$5x - {x}^{2} = 0 \\ x(5 - x) = 0 \\ x1 = 5 \\ x2 = 0$

$16 - {x}^{2} = 0 \\ {4}^{2} - {x}^{2} = 0 \\ x1 = - 4 \\ x2 = 4$