Question

решите уравнение 4х^2-17|x|-15=0​

Answer 1

$4x {}^{2} - 17x - 15 = 0$

$x \geqslant 0$

$4x {}^{2} - 17 \times ( - x) - 15 = 0$

$x < 0$

$x = - \frac{3}{4}$

$x = 5$

$x \geqslant 0$

$x = - 5$

$x = \frac{3}{4}$

$x < 0$

$x1 = 5$

$x2 = - 5$