因式分解(x+3)(x2-1)(x+5)-20

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因式分解(x+3)(x2-1)(x+5)-20
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因式分解(x+3)(x2-1)(x+5)-20
因式分解(x+3)(x2-1)(x+5)-20

因式分解(x+3)(x2-1)(x+5)-20
(x+3)(x2-1)(x+5)-20
=(x+3)(x-1)(x+1)(x+5)-20
=(x²+4x-5)(x²+4x+3)-20
=(x²+4x)²-2(x²+4x)-35
=(x²+4x-7)(x²+4x+5)