此题其实主要考率12的因子由于12=1*12=2*6=3*4所以原式=(x-1)*(x-12)+13x-ax=(x-2)*(x-6)+8x-ax=(x-3)*(x-4)+7x-ax当a=13时,原式=(x-1)*(x-12)当a=8时,原式=(x-2)*(x-6)当a=7时,原式=(x-3)*(x-4)所...