Question

Решить уравнение
7х-(30-х)*12х=77

Answer 1

$7x-(30-x)*12x=77$ ,

$7x - 360x + 12x^{2}=77$ ,

$12x^{2}-353x-77=0$ ,

$D = 353^{2}+4*12*77=124609+3696=128305$ ,

$x_{1}=frac{353-sqrt{128305}}{24}$ ,

$x_{2}=frac{353+sqrt{128305}}{24}$