(x-1)(x+1)(x+3)(x+5)-33急
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(x-1)(x+1)(x+3)(x+5)-33急(x-1)(x+1)(x+3)(x+5)-33急(x-1)(x+1)(x+3)(x+5)-33急原式=[(x-1)(x+5)][(x+1)(x+3)]-
(x-1)(x+1)(x+3)(x+5)-33急
(x-1)(x+1)(x+3)(x+5)-33急
(x-1)(x+1)(x+3)(x+5)-33急
原式=[(x-1)(x+5)][(x+1)(x+3)]-33
=[(x²+4x)-5][(x²+4x)+3]-33
=(x²+4x)²-2(x²+4x)-15-33
=(x²+4x)²-2(x²+4x)-48
=(x²+4x-8)(x²+4x+6)
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