(1)4(x²+3x+1)²-(x²+x-4)²-(x²+5x+6)²)

问题描述:

(1)4(x²+3x+1)²-(x²+x-4)²-(x²+5x+6)²)
(2)a^5+a^4+1
(3)ax^4-9x²+6x-1
(4)(x²+3x+4)(x²+3x+5)-6
(5)a²b²-a²-b²

(1)4(x²+3x+1)²-(x²+x-4)²-(x²+5x+6)²=[2(x²+3x+1)-(x²+x-4)][2(x²+3x+1)+(x²+x-4)]-(x²+5x+6)²=[2x²+6x+2-x²-x+4][2x²+6x+2+x&...