①2x^2-(x+2)(x-2)-(x+1)^2 ②（2x-y)(4x^2+y^2)(2x+y）③（-2xy^2）(1/4x^3y)^2④4a^2x^2(-2/5a^4x^2y^3)÷(-1/5a^5x^4y^2)急高手帮帮忙!

来源：学生作业帮助网编辑：作业帮时间：2024/05/06 04:17:19

①2x^2-(x+2)(x-2)-(x+1)^2 ②（2x-y)(4x^2+y^2)(2x+y）③（-2xy^2）(1/4x^3y)^2④4a^2x^2(-2/5a^4x^2y^3)÷(-1/5a^5x^4y^2)急高手帮帮忙!
①2x^2-(x+2)(x-2)-(x+1)^2 ②（2x-y)(4x^2+y^2)(2x+y）③（-2xy^2）(1/4x^3y)^2
④4a^2x^2(-2/5a^4x^2y^3)÷(-1/5a^5x^4y^2)急高手帮帮忙!

①2x^2-(x+2)(x-2)-(x+1)^2 ②（2x-y)(4x^2+y^2)(2x+y）③（-2xy^2）(1/4x^3y)^2④4a^2x^2(-2/5a^4x^2y^3)÷(-1/5a^5x^4y^2)急高手帮帮忙!
①2x^2-(x+2)(x-2)-(x+1)^2
=2x^2-(x^2-4)-(x^2+2x+1)
=2x^2-x^2+4-x^2-2x-1
=-2x+3
②（2x-y)(4x^2+y^2)(2x+y）
=（2x-y)(2x+y）(4x^2+y^2)
=(4x^2-y^2)(4x^2+y^2)
=16x^4-y^4
③（-2xy^2）(1/4x^3y)^2
=（-2xy^2）(1/16x^6y^2)
=-1/8 x^7 y^4
④4a^2x^2(-2/5a^4x^2y^3)÷(-1/5a^5x^4y^2)
=-8/5a^4 x^4 y^3)÷(-1/5a^5x^4y^2)
=8a^(-1) y

①2x^2-(x+2)(x-2)-(x+1)^2
=2x^2-(x^2-4)-(x^2+2x+1)
=2x^2-x^2+4-x^2-2x-1
=3-2x

②（2x-y)(4x^2+y^2)(2x+y）
=(2x-y)(2x+y)(4x^2+y^2)
=(4x^2-y^2)(4x^2+y^2)
=16x^4-y^4

全部展开

①2x^2-(x+2)(x-2)-(x+1)^2
=2x^2-(x^2-4)-(x^2+2x+1)
=2x^2-x^2+4-x^2-2x-1
=3-2x

②（2x-y)(4x^2+y^2)(2x+y）
=(2x-y)(2x+y)(4x^2+y^2)
=(4x^2-y^2)(4x^2+y^2)
=16x^4-y^4

③（-2xy^2）(1/4x^3y)^2
=（-2xy^2）(1/16x^6y^2)
=-1/8x^7y^4

④4a^2x^2(-2/5a^4x^2y^3)÷(-1/5a^5x^4y^2)
=-8/5a^6x^4y^3÷(-1/5a^5x^4y^2)
=8ay

【数学辅导团】为您解答！
不理解请追问，理解请点击“选为满意回答！”按钮
(*^__^*)谢谢！

收起

300字读后感 2篇俄把格式说一下吧：《xxxx》（写题目）主要内容：x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x(写那篇文章的主要内容）思考分析：x x x *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 分解因式：x*x*x*x+2*x*x*x-9*x*x-2x+8 x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 七年级下册政治复习提纲(山东人民出版社)第五单元是青春的脚步青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. (x/x-2-x/x+2)/4x/x-2 分解因式----（X*X-X)(X*X-X-2)+1 |-x|+|x+2|-|2-x| x(x-2)(x-3) {x|(x+3)(x-2) -x^3+x^2-x x×x+3x-9/ x+2 f(x)=x^2+x (x |x|-2/x*x-x-12 x+2x+3x+.+100x 】x(x+1)+x^2(x-1) (x*x-3)*(x*x-3)-x*(x*x-3)-2x*x 因式分解