Question

решите уравнение, пжжжжжжжжж

Answer 1

$x+2= frac{20x+7}{x}$
х(х+2)=20х+7
$x^{2} +2x=20x+7$
$x^{2}-18x-7=0$
$D=352$
$x_{1} =frac{18+2 sqrt{88}} {2}= frac{2 (9+sqrt{88})}{2}= 9+sqrt{88}$
$x_{2} =frac {2 (9- sqrt{88})}{2}=9- sqrt{88}$