<span>3-2(5х+4)=13-4х</span>
<span>3-10х-8= 13-4х</span>
<span>-10х+4х= 13-3+8</span>
<span>6х= 18</span>
<span>х=18:6</span>
<span>х=3</span>
3-10х-8=13-4х
-10х+4х=13-3+8
-6х=18
х=-3
(сказать спасибо)
Ответ:
x^2+2x+q=0
{x1+x2=-2, {x1=8
{x1×x2=q. {x2=-10
{x1+x2=-2
{x1×x2=-80
x^2+2x-80=0
x1=-2
x2=-10