Răspuns :
2x²+ 5x-2x-5-3x²-6x+9+x²-2x
2x²-3x²+x²+5x-2x-3x-2x-6x+9
-2x-6x+9
-8x+9
9-8x
2x²-3x²+x²+5x-2x-3x-2x-6x+9
-2x-6x+9
-8x+9
9-8x
2x²-2x+5x-5-3x²-6x+9+x²-2x subliniem termenii cu putere apoi cu x si termenii liberi ii scadem sau adunam -7x+4=0 =>x=-4/7