2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y3x(a-b)-2y(b-a)a^2(y-3)+(3-y)x^2(x-y)-(x-y)4xy-4x^2y-y(3a+2)^2-(a-6)^2x^4-8x^2+16我已经提高悬赏分

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2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y3x(a-b)-2y(b-a)a^2(y-3)+(3-y)x^2(x-y)-(x-y)

2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y3x(a-b)-2y(b-a)a^2(y-3)+(3-y)x^2(x-y)-(x-y)4xy-4x^2y-y(3a+2)^2-(a-6)^2x^4-8x^2+16我已经提高悬赏分
2xy-xz
6x^2+9x
4x^2-9
x^2-4x+4
x^2-16y^2
9x^2-6x+1
2x^2y-8xy+8y
3x(a-b)-2y(b-a)
a^2(y-3)+(3-y)
x^2(x-y)-(x-y)
4xy-4x^2y-y
(3a+2)^2-(a-6)^2
x^4-8x^2+16
我已经提高悬赏分

2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y3x(a-b)-2y(b-a)a^2(y-3)+(3-y)x^2(x-y)-(x-y)4xy-4x^2y-y(3a+2)^2-(a-6)^2x^4-8x^2+16我已经提高悬赏分
x(2y-z)
3x(2x + 3)
4(x-3/2)(x+3/2)
(x - 2)^2
(x -4y)(x+4y)
(3x -1)^2
2y(x -2)^2
(a-b)(3x+2y)
(y-3)(a-1)(a+1)
(x-y)(x-1)(x+1)
-y(2x-1)^2
先用平方差公式得:(3a+2+a-6)[(3a+2)-(a-6)],整理得,8(a-1)(a+4)
(x^2-4)^2=(x+2)^2*(x-2)^2

分太少题太多而且太简单

2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y 2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y3x(a-b)-2y(b-a)a^2(y-3)+(3-y)x^2(x-y)-(x-y)4xy-4x^2y-y(3a+2)^2-(a-6)^2x^4-8x^2+16我已经提高悬赏分 求用因式分解解下列题目x³-9x4x³y+4x²y²+xy³(a-b)³-(a-b)x²-2xy+y²-9 一道 简单的不等式 组..1/2X >1/3X4X-3≥1 用不等式的性质解下列不等式:2x-4>0; 3x4x+3;-5x+6 (1/2)X>(1/3)X4X-3≥1上面两个不等式组成一个不等式组, 4x平方-y平方-1-2y x平方-2xy +y平方+4x-4y+4 分解因式ax平方+1+(a+1)x4x平方-y平方-1-2yx平方-2xy +y平方+4x-4y+4分解因式 x^2-25x2x^2y^2-4y^3zam-an+apx^3-25x1-4x^225x^2+20xy+4y^2x^3+4x^2+4x4x^4-4x^3+x^2x^2-16ax+64a^2(x-1)(x-3)+1(ab+a)+(b+1) 解下列不等式:(1)x-5<12x>3(2)2x-5>03-x<-1(3)3x-1>52x<6(4)1/2x>1/3x4x-3≥1(5)-2x≥03x+5≤0(6)x+1/2>17x-8<9x注:”/”表示分数线 (6x-2)*8+4x=140怎么解还有2x-100-x=3950是(6x-2)X4x=140 初中的几道一元二次方程,(x-1)(x+2)=70(3-t)^2+t^2=9(2x-1)(x+3)=43x(x-1)=2-2x4x^2-3=x^2+4x9(2x+3)^2-4(2x-5)^2=0 数学初中知识,因式分解在线等,数学高手求帮忙.把下列各式分解因式25m平方-n平方4-4x+x平方x平方-x-12x平方+x-12(x-2)平方-2(x-2)x平方+3xy+2y平方x平方-8x4x平方-4x+1(2x+3)平方-(1-3x)平方x平方-11x+18把下 1又2分之1:0.4=1.35:x4x-7x1.3=9.9 若定义一种新的运算,规定,abcd的绝对值=ad-bc,则当2x4x的绝对值=27时,x=?abcd的绝对值是 |ab| 这 上下两个连起来 2x4x的绝对值 |2 4| 这上下两个连起来|cd| |x x| | (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x, 已知x-xy=8,xy-y=-9,求x+y-2xy的值 (9x^2y-6xy^2)/3xy [ 2x-6y][8-9xy]÷xy等于?