Question

х2 - 6х + 8 = 0;
Зу2 - 8y + 4 = 0​

Answer 1

1.

${x}^{2} - 6x + 8 = 0 \\ D = ( - 6)^{2} - 4 \times 8 = 4 = {2}^{2} \\ x_{1} = \frac{6 + 2}{2} = 4 \\ x_{2} = \frac{6 - 2}{2} = 2$

Ответ: 2, 4

2.

$3 {y}^{2} - 8y + 4 = 0 \\ D = ( - 8)^{2} - 4 \times 3 \times 4 = 16 = {4}^{2} \\ y_{1} = \frac{ 8 + 4}{6} = 2 \\ y_{2} = \frac{8 - 4}{6} = \frac{1}{3}$

Ответ: 1/3, 2