|4x 2(x-1)² (x+1) (1-x)|
= 4x(1-x)- 2 (x-1)²(x+1)
=2(1-x)·2x - 2(1-x)·(1-x)(1+x)
=2(1-x)·2x - 2(1-x)·(1-x²)
=2(1-x)(x²+2x-1)
=2(1-x)【(x+1)² -(√2)²】
= -2(x-1)(x+1+√2)(x+1-√2)
|4x 2(x-1)² (x+1) (1-x)|
= 4x(1-x)- 2 (x-1)²(x+1)
=2(1-x)·2x - 2(1-x)·(1-x)(1+x)
=2(1-x)·2x - 2(1-x)·(1-x²)
=2(1-x)(x²+2x-1)
=2(1-x)【(x+1)² -(√2)²】
= -2(x-1)(x+1+√2)(x+1-√2)