2道因式分解,(x+1)(x+2)(x+3)(x+4)-24 (x+y-z)(x-y+z)-4yz
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2道因式分解,(x+1)(x+2)(x+3)(x+4)-24(x+y-z)(x-y+z)-4yz2道因式分解,(x+1)(x+2)(x+3)(x+4)-24(x+y-z)(x-y+z)-4yz2道因式
2道因式分解,(x+1)(x+2)(x+3)(x+4)-24 (x+y-z)(x-y+z)-4yz
2道因式分解,
(x+1)(x+2)(x+3)(x+4)-24
(x+y-z)(x-y+z)-4yz
2道因式分解,(x+1)(x+2)(x+3)(x+4)-24 (x+y-z)(x-y+z)-4yz
(x+1)(x+2)(x+3)(x+4)-24
=(x+1)(x+4)(x+2)(x+3)-24
=(x^2+5x+4)(x^2+5x+6)-24
=(x^2+5x+5-1)(x^2+5x+5+1)-24
=(x^2+5x+5)^2-1-24
=(x^2+5x+5+5)(x^2+5x+5-5)
=x(x+5)(x^2+5x+10)
(x+y-z)(x-y+z)-4yz
=[x+(y-z)][x-(y-z)]-4yz
=x^2-(y-z)^2-4yz
=x^2-y^2-z^2+2yz-4yz
=x^2-(y+z)^2
=(x+y+z)(x-y-z)
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