Question

Помогите)))))))))))​

Answer 1

Объяснение:

$49x - {x}^{2} = 0 \\ x(49 - x) = 0 \\ x = 0 \\ x = 49$

${x}^{2} - 9 = 0 \\ x - 3 = 0 \\ x + 3 = 0 \\ x = 3 \\ x = - 3$

$2 {x}^{2} - 7x + 5 = 0 \\ 2x \times (x - 1) - 5 \times (x - 1) = 0 \\ x - 1 = 0 \\ 2x - 5 = 0 \\ x = 1 \\ x = 2.5$