2x的四次方－x²-1怎么因式分解?x²-(a+1)x+a怎么因式分解?

2x的四次方－x²-1怎么因式分解?x²-(a+1)x+a怎么因式分解?
2x的四次方－x²-1怎么因式分解?x²-(a+1)x+a怎么因式分解?

2x的四次方－x²-1怎么因式分解?x²-(a+1)x+a怎么因式分解?
2x^4-x²-1
=(2x²+1)(x²-1)
=(2x²+1)(x+1)(x-1)
x²-(a+1)x+a
=(x-a)(x-1)

2x^4-x^2-1
=(x^2-1)(2x^2+1)
=(x+1)(x-1)(2x^2+1)
x^2-(a+1)x+a
=(x-1)(x-a)
x -1
x -a

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