(2x-3)(2x+3) (3x-1)^2 (-2X)(3X^2-2X+1) (2X-3)(3X+2) (X-2)(X+2)(X^2+4)

问题描述:

(2x-3)(2x+3) (3x-1)^2 (-2X)(3X^2-2X+1) (2X-3)(3X+2) (X-2)(X+2)(X^2+4)
1.(2x-3)(2x+3)
2.(3x-1)^2
3.(-2X)(3X^2-2X+1)
4.(2X-3)(3X+2)
5.(X-2)(X+2)(X^2+4)
6.(X+1)^2(X-1)
7.先化简再求值:(X-1)(3X+1)-(X+1)^2,其中X=-1

(2x-3)(2x+3)=4x²-9
(3x-1)²=9x²-6x+1
(-2x)(3x²-2x+1)=-6x³+4x²-2x
(2x-3)(3x+2)=6x²+4x-9x-6=6x²-5x-6
(x-2)(x+2)(x²+4)=(x²-4)(x²+4)=x⁴-16请给步骤写上,我不要答案谢谢