（3x^y-2x+1)(-2xy)

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/04/29 17:36:06

（3x^y-2x+1)(-2xy)
(2x-1)(x-3)
-3a(a-b)^2
(x-2)(x-3)-(x+5)(x-5)
(a+2b-3c)(a-2b-3c)
(2a+b)^2(2a-b)^2
因式分解
4a^2-16
-2x^2-12xy^2+8xy^3
a^2-4(a-b)^2
4x(a-b)-8y(b-a)
(a+3b)^2-9(a-b)^2
(x^2-5)^2+8(x^2-5)+16
(a^2+b^2)^2-4a^2b^2
25(a+b)^2-9(a-b)^2

（3x^2y-2x+1)(-2xy)
=-6x^3y^2+4x^2y-2xy
(2x-1)(x-3)
=2x^2-7x+3
-3a(a-b)^2
=-3a(a^2-2ab+b^2)
=-3a^3+6a^2b-3ab^2
(x-2)(x-3)-(x+5)(x-5)
=x^2-5x+6-x^2+25
=-5x+31
(a+2b-3c)(a-2b-3c)
=(a-3c)^2-(2b)^2
=a^2-6ac+9c^2-4b^2
(2a+b)^2(2a-b)^2
=[(2a+b)(2a-b)]^2
=(4a^2-b^2)^2
=16a^4-8a^2b^2+b^4
因式分解
4a^2-16
=4(a^2-4)
=4(a-2)(a+2)
-2x^2-12xy^2+8xy^3
=-2x(x+6y^2-4y^3)
a^2-4(a-b)^2
=[a-2(a-b)][a+2(a-b)]
=(2b-a)(3a-2b)
4x(a-b)-8y(b-a)
=4x(a-b)+8y(a-b)
=4(a-b)(x+2y)
(a+3b)^2-9(a-b)^2
=[(a+3b)-3(a-b)][(a+3b)+3(a-b)]
=(6b-2a)*4a
=8a(3b-a)
(x^2-5)^2+8(x^2-5)+16
=(x^2-5+4)^2
=(x^2-1)^2
=[(x-1)(x+1)]^2
=(x-1)^2(x+1)^2
(a^2+b^2)^2-4a^2b^2
=[(a^2+b^2)-2ab][(a^2+b^2)+2ab]
=(a-b)^2(a+b)^2
25(a+b)^2-9(a-b)^2
=[5(a+b)-3(a-b)][5(a+b)+3(a-b)]
=(2a+8b)(8a+2b)
=4(a+4b)(4a+b)

计算3xy[2xy-x(y-2)+x-1] 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) xy(xy+1)+(xy+3)-2(x+y+2分之一）-(x+y-1)的平方 (-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)] (x+y-2xy)(x+y-2)+(1-xy)² (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) 1/2xy-{1/2xy-[1/3x^2y-(x^2y-xy)]+1/3x^2y} 计算：(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3 （x+2y-3xy)-(-2x-y+xy),其中x+y=1/2,xy=-1/2 已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y) 已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y= 已知:xy+x=-1,xy-y=-2,求多项式-x-[2y-2(xy+x)的平方+3x]+2[x+(xy-y)的平方]的