Ответ:\(x^2-12x+35=(x-5)(x-7)\).\(x^2+9x+20=(x+4)(x+5)\).\(5x^2+9x-2=(5x-1)(x+2)\).\(4x^2-x-3=(4x+3)(x-1)\).\(-2x^2+5x-2=-(2x-1)(x-2)\).\(\frac23x^2+2x-12=\frac23(x+6)(x-3)\).