1.(2a+3b)(3a-4b) 2.(2x-3y)(3y-2x)-(4y-3x)(3x-4y) 3.(x+3y)(x-

来源：学生作业帮编辑：搜狗做题网作业帮分类：数学作业时间：2024/05/12 05:14:48

1.(2a+3b)(3a-4b) 2.(2x-3y)(3y-2x)-(4y-3x)(3x-4y) 3.(x+3y)(x-2y)-2(x-y)平方求这4道数学+50分
4.（x-5）（x+5）-（x-1）平凡=（3x+5）（x-1）-3x(x+1)

1.(2a+3b)(3a-4b)=6a^2+ab-12b^2
2.(2x-3y)(3y-2x)-(4y-3x)(3x-4y)
=-(2x-3y)^2+(3x-4y)^2
=(3x-4y+2x-3y)*(3x-4y-2x+3y)
=(5x-7y)*(x-y)
=5x^2-12xy+7y^2
3.(x+3y)(x-2y)-2(x-y)^2
=x^2+xy-6y^2-2x^2-2y^2+4xy
=-x^2-8y^2+5xy
4.（x-5）（x+5）-（x-1）^2=（3x+5）（x-1）-3x(x+1)
x^2-25-x^2+2x-1=3x^2+2x-5-3x^2-3x
2x-26=-x-5
3x=21
x=7

(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+ 因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( 化简题.化简,(a^-3b^4)^2乘(3a^2b)^-2.(x+y)乘x^2/x^2-y^2+y^2/y-x.y-3/ 已知集合A={（x,y)| (y-3)/ (x-1)=2,x,y∈R},B={（x,y)| 4x+ay=16,x,y∈ 计算 1.[(a+b)^2-(a+b)(a-b)]÷(-b) 2.[(x+y)(2x+y)+(x+y)(x-y)]÷3x 几道因式分解..4ab(a+b)^2-6a^2b(a+b)(x+y)^2(x-y)+(x+y)(x-y)^22a(a-3 1.(2a+3b)(3a-4b) 2.(2x-3y)(3y-2x)-(4y-3x)(3x-4y) 3.(x+3y)(x- 分解因式1.x^2+y^2+2x+6y+10 2.(1-y)^3+4(y-x) 3.(a-c)^2-4(a-b)(b-c x²（x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3 1.设A={(x,y)/4x+y=6} B={(x,y)/3x+2y=7} 则A∩B等于多少 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y(