问题
填空题
分解因式:(x-3) (x-1) (x-2) (x+4)+24=______.
答案
(x-2)(x+3)(x2+x-8)
∵原式=(x-3)(x+4)(x-1)(x+2)+24
=(x2+x-12)(x2+x-2)+24
令x2+x=A,
∴原式=(A-12)(A-2)+24
=(A-6)(A-8)
=(x2+x-6)(x2+x-8)
=(x-2)(x+3)(x2+x-8)
分解因式:(x-3) (x-1) (x-2) (x+4)+24=______.
(x-2)(x+3)(x2+x-8)
∵原式=(x-3)(x+4)(x-1)(x+2)+24
=(x2+x-12)(x2+x-2)+24
令x2+x=A,
∴原式=(A-12)(A-2)+24
=(A-6)(A-8)
=(x2+x-6)(x2+x-8)
=(x-2)(x+3)(x2+x-8)