Question

решите уравнение
$x^{2} -5x=3- x^{2}$

Answer 1

$x {}^{2} - 5x - 3 + x {}^{2} = 0$
$2 x {}^{2} - 5x - 3 = 0$
$x = frac{ sqrt{( - 5) {}^{2} - 4 times 2 times ( - 3)} }{2 times 2}$
$x = frac{5 + - sqrt{25 + 24} }{4}$
$x = frac{5 + - 49}{4}$
$x = frac{5 + 7}{4}$
$x = frac{5 - 7}{4}$
$x = 3$
$x = - frac{1}{2}$