(1).(x+y)(a+2b)

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/11 07:17:38

(1).(x+y)(a+2b)
(2).(2a+3)(2/3b+5)
(3).(2x+3)(-x-1)
(4).(-2m-1)(3m-2)
(5).(x-y)^2
(6).(-2x+3)^2

(1).(x+y)(a+2b)
=ax+2bx+ay+2by
(2).(2a+3)(2/3b+5)
=4/3ab+10a+2b+15
(3).(2x+3)(-x-1)
=-2x^2-2x-3x-3
=-2x^2-5x-3
(4).(-2m-1)(3m-2)
=-6m^2+4m-3m+2
=-6m^2+m+2
(5).(x-y)^2
=x^2-2xy+y^2
(6).(-2x+3)^2
=4x^2-12x+9

因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( (1).(x+y)(a+2b) 应是分解a^2(a-b)+(b-a)(x-y)^2-2(y-x)+1 1、(a-b)(x-y)-(b-a)(x+y) (1) (a+2b/a-b)+(b/b-a)-(2a/a-b); (2) (y/x-y+z)+(2x+z/y-x-z)- (x+y)(a-2b) (3x-y)(3x+y)+y(x+y);(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)快点, 1.已知集合A=｛（x,y)|y=2x+1｝,B=｛(x,y)|y=x+3｝,a∈A,b∈B,求a 因式分解(a-b)^2-6(b-a)+9.25(x-y)^2+10(y-x)+1 1.x（x-y）+y（y-x）2.9（a-b）^2-16(a+b)^2 3.25(x-y)^2+10(y-x)+1 已知a^x-y*a^2y+1=a^11,且b^x-1*b^4-y=b^5,求(x^2)*y的值已知集合A={(x,y)|(y-2)/(x-1)=a+2,x,y∈R},B={(x,y)|(a²-4)x+(a