Question

Прмогите пожалуйста срочнооо!!! ​

Answer 1

Ответ:

$s = \pi \times {r}^{2}$

$507 = 3 \times {(7 + x)}^{2}$

$507 = 3 \times (49 + 14x + {x}^{2})$

$507 = 147 + 42x + 3 {x}^{2}$

$3 {x}^{2} + 42 - 360 = 0$

${x}^{2} + 14x - 120 = 0$

$d = 196 - 4 \times ( - 120) \times 1 = 196 + 480 = \sqrt{676} = 26$

$x = \frac{ - 14 - 26}{2 \times 1} = \frac{ - 40}{2} = - 20$

$x = \frac{ - 14 + 26}{2 \times 1} = \frac{12}{2} = 6$

$s = \pi \times {r}^{2}$

$s = 3 \times {6}^{2} = 108$