Помогитеееее запишите уравнения в виде: ax^2+bx+c=0 4=-2x+x^2 6=x^2 7x=-x^2/5 7x-x^2=0...

Решите задачу:

$4=-2x+x^2 \ \textgreater \ \ \textgreater \ \ \textgreater \ x^2-2x-4 = 0$
$6=x^2 \ \textgreater \ \ \textgreater \ \ \textgreater \ x^2-6=0$
$7x=-x^2/5 \ \textgreater \ \ \textgreater \ \ \textgreater \ = x^2$
$7x= -\frac{x^2}{5} \ \textgreater \ \ \textgreater \ \ \textgreater \ = x^2+35x=0$
$7x-x^2=0 \ \textgreater \ \ \textgreater \ \ \textgreater \ x^2-7x=0$
$4x^2+4x+4=x+3 \ \textgreater \ \ \textgreater \ \ \textgreater \ 4x^2+3x+1=0$
$9x^2=25 \ \textgreater \ \ \textgreater \ \ \textgreater \ = 9x^2-25 = 0$