8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/21 09:19:01

8x^3y^3-1/125 4a^2+b^2+c^2-4ab+4ac-2bc 5X^2-15x+2xy-6y a^2(x+y)^3-a^2b^3
还有几个
7(a+b)^2-5(a+b)-2
6x^2-7x-3
x^3+2x^2+2x+1
2X^2-3x-1
x^2+4x-1

8x^3y^3-1/125
=(2xy)^3-(1/5)^3
=(2xy-1/5)(4x^2y^2+2xy/5+1/25)
4a^2+b^2+c^2-4ab+4ac-2bc
=(2a-b)^2+2c(2a-b)+c^2
=(2a-b+c)^2
( 5X^2-15x+2xy-6y
=x(5x+2y)-3(5x+2y)
=(5x+2y)(x-3)
a^2(x+y)^3-a^2b^3
=a^2[(x+y)^3-b^3]
=a^2(x+y-b)[(x+y)^2+b(x+y)+b^2]
=a^2(x+y-b)(x^2+2xy+y^2+bx+by+b^2)
希望能帮到你,祝学习进步O(∩_∩)O
再问：还有几个帮帮忙 7(a+b)^2-5(a+b)-2 6x^2-7x-3 x^3+2x^2+2x+1 2X^2-3x-1 x^2+4x-1 16-8xy-16x^2-y^2
再答： 7(a+b)^2-5(a+b)-2=[7(a+b)+2][(a+b)-1]=(7a+7b+2)(a+b-1) 6x^2-7x-3=(3x+1)(2x-3) x^3+2x^2+2x+1=(x^3+x^2)+(x^2+2x+1)=x^2(x+1)+(x+1)^2=(x+1)(x^2+x+1) 2X^2-3x-1 (在有理数范围内不能分解因式) =2(x^2-3x/2-1/2)=2(x^2-3x/2+9/16-17/16) =2[(x-3/4)^2-(√17/4)^2]=2(x-3/4+√17/4)(x-3/4-√17/4) x^2+4x-1 (在有理数范围内不能分解因式) =x^2+4x+4-5 =(x+2)^2-(√5)^2 =(x+2+√5)(x+2-√5) 16-8xy-16x^2-y^2 =16-(16x^2+8xy+y^2) =4^2-(4x+y)^2 =(4+4x+y)(4-4x-y) 希望能帮到你，祝学习进步O(∩_∩)O

3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy x²（x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3 已知A=x^3+3x^2y-5xy^2+6y^3-1,B=y^3+2xy^2+x^2y-2x^3+2,C=x^3-4x^ x的平方+y的平方-x+y-6-2xy 还有 a的平方+2ab+b的平方+2ac+2bc+c的平方因式分解分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+ A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y,若x= 设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若x 设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y.若x 已知A=5x^+2xy-4y^,B=-x^-4xy+y^,C=x^-xy+3y^其中xy满足|2x+1|+(y-4)^= 约分 2x三次+x分之1-4x四次方 y-x平方y分之x平方y-2xy+y a平方-6ab+9b平方分之a平方-3ab 通分（1）6c/a²b与c/3ab² （2）x - y/2x+3y与xy/（x+y）² 已知A=2x²+3xy-y²,B=-1/2xy,C=1/8x³y³-1/4x&#