（-2x+1)(-2x-1)-(2x-1)^2.(2x-1)(x+2)-(x-2)^2-(x+2)^2.(a-2b)^2

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/11 01:08:42

（-2x+1)(-2x-1)-(2x-1)^2.(2x-1)(x+2)-(x-2)^2-(x+2)^2.(a-2b)^2-(2b+a)(2b-a)

（-2x+1)(-2x-1)-(2x-1)^2.
=(2x-1)(2x+1)-(2x-1)²
=(2x-1)(2x+1-2x+1)
=2(2x-1)
=4x-2
(2x-1)(x+2)-(x-2)^2-(x+2)^2.
=(2x²+3x-2)-(x²-4x+4)-(x²+4x+4)
=2x²+3x-2-x²+4x-4-x²-4x-4
=3x-10
(a-2b)^2-(2b+a)(2b-a)
=(a-2b)²+(a+2b)(a-2b)
=(a-2b)(a-2b+a+2b)
=2a(a-2b)
=2a²-4a

x^2-6x+5= A(x-2)(x-3)B(x-6)(x+1) x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2) {2X+1}+{X} x^2-|x|+1 ｜x-1｜+｜x-2｜ x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 化简：x(x^2+x)/x^2(x^2-1) x/x平方-x+2=2x/x+1 1、x(x-y)(x+y)-x(x+y)^2 1+x+x^2+x^3+.+x^99+x^100 设集合A={x|x-2/2x+1>1},B={x||x-a|