(x²-1)²-32(x²-1)+128
=(x²-1)²-32(x²-1)+256-128
=[(x ²-1)-16]²-128
=(x²-17)²-128
=(x²-17+8√2)(x²-17-8√2)
[此题还可以用平方差公式a²-b²=(a+b)(a-b)继续往下分,但意义不大]
(x²-1)²-32(x²-1)+128
=(x²-1)²-32(x²-1)+256-128
=[(x ²-1)-16]²-128
=(x²-17)²-128
=(x²-17+8√2)(x²-17-8√2)
[此题还可以用平方差公式a²-b²=(a+b)(a-b)继续往下分,但意义不大]