急啊! ! ! ! ! ! !一道初一数学题,求过程和答案。拜托各位帮帮忙啦~~~ ...

2024-12-16 05:59:14
推荐回答(5个)
回答1:

解:设x²-2x=y。则可化为(y-2)(y-9)+6=y²-11y+24=(y-3)(y-8)=(x²-2x-3)(x²-2x-8)=(x-3)(x+1)(x-4)(x+2)

回答2:

(x^2-2x-2)(x^2-2x-9)+6
=(x²-2x)²-9(x²-2x)-2(x²-2x)+18+6
=(x²-2x)²-11(x²-2x)+24
=(x²-2x-3)(x²-2x-8)
=(x-3)(x+1)(x-4)(x+2)

回答3:

(x^2-2x-2)(x^2-2x-9)+6
=(x²-2x)²-11(x²-2x)+18+6
=(x²-2x)²-11(x²-2x)+24
=(x²-2x-3)(x²-2x-8)
=(x-3)(x+1)(x+2)(x-4)

回答4:

(x^2-2x-2)(x^2-2x-9)+6
=(x^2-2x-2)^2-7(x^2-2x-2)+6
=(x^2-2x-2-6)(x^2-2x-2-1)
=(x^2-2x-8)(x^2-2x-3)
=(x-4)(x+2)(x-3)(x+1)

回答5:

(x^2-2x-2)(x^2-2x-9)+6
=4x²-2x²-18+6
=0-18+6
=-12