:(X十2)x(X十2)一5x(X一1)x(x一1)=9X一2Xx2X一2
x^2+4x+4-5(x^2-2x+1)=9x-4x^2-2
-4x^2+14x-1=9x-4x^2-2
5x=-1
x=-1/5