分解因式:(x²-1)²-15(x²-1)+56

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分解因式:(x²-1)²-15(x²-1)+56分解因式:(x²-1)²-15(x²-1)+56分解因式:(x²-1)²

分解因式:(x²-1)²-15(x²-1)+56
分解因式:(x²-1)²-15(x²-1)+56

分解因式:(x²-1)²-15(x²-1)+56
=(x²-8)(x²-9)=(x²-8)(x-3)(x+3)

(x²-1)²-15(x²-1)+56
=(x²-1-7)(x²-1-8)
=(x²-8)(x²-9)
=(x+2√2)(x-2√2)(x+3)(x-3)

(x²-1)²-15(x²-1)+56
=[(x²-1)-7][(x²-1)-8]
=(x²-8)(x²-9)
=(x²-8)(x-3)(x+3)
=(x-2√2)(x+2√2)(x+3)(x-3)