Question

памагити пажалувста мине

Answer 1

$x ^{4} - 17x^{2} + 16 = 0$

${x}^{2} = y$

${y}^{2} - 17y + 16 = 0$

$d = 289 - 4 \times 1 \times 16 = 225 = 15^{2}$

$y1 = \frac{17 + 15}{2 \times 1} = \frac{32}{2} = 16$

$y2 = \frac{17 - 15}{2 \times1 } = \frac{2}{2} = 1$

X2=16 не подходит

Ответ : 1