Question 668355
{{{-x^2 + 2x<= -6x + 12}}}

Add 6x to both sides

{{{-x^2 + 2x+6x<= -6x +6x+ 12}}}


{{{-x^2+8x<=12}}}

Add -12 to both sides

{{{-x^2+8x-12<=12-12}}}

{{{-x^2+8x-12<=0}}}


{{{-x^2-6x-2x-12<=0}}}

{{{-x(x+6)-2(x+6)<=0}}}

{{{(x+6)(-x-2)<=0}}}

{{{x<=-6}}}

OR

{{{x>=-2}}}