试尽可能多的给出整数a,使代数式x^2-ax-12在整数范围内可以因式分解.

因为：-12 =-12*1 =-6*2 =-4*3 =-3*4 =-2*6 =-1*12 所以：x^2+11x-12=(x-12)(x+1) x^2+4x-12=(x-6)(x+2) x^2+x-12=(x-4)(x+3) x^2-x-12=(x-3)(x+4) x^2-4x-12=(x-2)(x+6) x^2-11x-12=(x-1)(x+12)