(x^2-2x)(x^2-2x+4)+3
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(x^2-2x)(x^2-2x+4)+3
(x+1)(x+2)(x+3)(x+4)-120
(x+1)(x+2)(x+3)(x+4)-120
(x^2-2x)(x^2-2x+4)+3
=(x²-2x)²+4(x²-2x)+3;
=(x²-2x+1)(x²-2x+3)
=(x-1)²(x²-2x+3)
(x+1)(x+2)(x+3)(x+4)-120
=(x²+5x+4)(x²+5x+6)-120
=(x²+5x)²+10(x²+5x)+24-120
=(x²+5x)²+10(x²+5x)-96
=(x²+5x+16)(x²+5x-6)
=(x²+5x+16)(x-2)(x-3);
如果本题有什么不明白可以追问,
=(x²-2x)²+4(x²-2x)+3;
=(x²-2x+1)(x²-2x+3)
=(x-1)²(x²-2x+3)
(x+1)(x+2)(x+3)(x+4)-120
=(x²+5x+4)(x²+5x+6)-120
=(x²+5x)²+10(x²+5x)+24-120
=(x²+5x)²+10(x²+5x)-96
=(x²+5x+16)(x²+5x-6)
=(x²+5x+16)(x-2)(x-3);
如果本题有什么不明白可以追问,
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