求解因式分解x(2x-1)(2x-5)(x-2)-3
求解因式分解x(2x-1)(2x-5)(x-2)-3
日期:2012-11-03 12:12:45 人气:1
原式
=[(x-1)+1][(x-1)-1][(2x-3)+2][(2x-3)-2]-3
=[(x-1)^2-1][(2x-3)^2-4]-3
=(x-1)^2[(2x-3)^2-4]-[(2x-3)^2-4]-3
=(x-1)^2[(4x^2-12x+9)-4]-[(2x-3)^2-1]
=(x-1)^2(4x^2-12x+5)-[(2x-3)-1][(2x-3)+1]
=(x-1)^2(4x^2-12x+5)-4(x-2)(x-1)
=(x-1)[(x-1)(4x^2-12x+5)-4(