因式分解:(x+2)(x+3)(x+4)(x+5)-24 5
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(x+2)(x+3)(x+4)(x+5)-24
=(x+2)(x+5)(x+3)(x+4)-24
=(x²+7x+10)(x²+7x+12)-24
=(x²+7x+10)²+2(x²+7x+10)-24
=(x²+7x+10+6)(x²+7x+10-4)
=(x²+7x+16)(x²+7x+6)
=(x²+7x+16)(x+1)(x+6)
=(x+2)(x+5)(x+3)(x+4)-24
=(x²+7x+10)(x²+7x+12)-24
=(x²+7x+10)²+2(x²+7x+10)-24
=(x²+7x+10+6)(x²+7x+10-4)
=(x²+7x+16)(x²+7x+6)
=(x²+7x+16)(x+1)(x+6)
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