16. 5x² − 10x − 2 = 0

Question

Дискриминант: \(D=(-10)^2-4\cdot5\cdot(-2)=140\).

\(x=\frac{10\pm\sqrt{140}}{10}=1\pm\frac{\sqrt{35}}{5}\).

Ответ: \(x=1-\frac{\sqrt{35}}5;\ 1+\frac{\sqrt{35}}5\).

Accepted Answer

Дискриминант: \(D=(-10)^2-4\cdot5\cdot(-2)=140\).

\(x=\frac{10\pm\sqrt{140}}{10}=1\pm\frac{\sqrt{35}}{5}\).

Ответ: \(x=1-\frac{\sqrt{35}}5;\ 1+\frac{\sqrt{35}}5\).