Автор - cluff4ik

Помогите решить квадратное уравнение.
x ( в квадрате ) + 4x = 192

Ответ

Автор - rina2403k

x {}^{2}  + 4x = 192 \ x {}^{2}  + 4x - 192 = 0 \ d = 4 {}^{2}  + 4 times 192 = 16 + 768 = 784 \  sqrt{784}  = 28 \ x1 =  frac{ - 4 - 28}{2}  =  frac{ - 32}{2}  =  - 16 \ x2 =  frac{ - 4 + 28}{2}  =  frac{24}{2}  = 12

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