(x+1)2-2(x2-1)+(x-1)² (x2-3x+1)(x2-3x-3)-5 因式分解

问题描述:

(x+1)2-2(x2-1)+(x-1)² (x2-3x+1)(x2-3x-3)-5 因式分解

(x+1)2-2(x2-1)+(x-1)²
=(x+1)2-2(x=1)(x-1)+(x-1)²
=【(x+1)-(x-1)】²
=2²
=4
(x2-3x+1)(x2-3x-3)-5
=(x²-3x)²-2(x²-3x)-3-5
=(x²-3x)²-2(x²-3x)-8
=(x²-3x+2)(x²-3x-4)
=(x-1)(x-2)(x+1)(x-4)

(x+1)²-2(x²-1)+(x-1)²=(x+1)²-2(x+1)(x-1)+(x-1)²=[(x+1)-(x-1)]²=2²=4(x²-3x+1)(x²-3x-3)-5=[(x²-3x)+1][(x²-3x)-3]-5=(x²-3x)²-2(x²-3x)...