6x(x-y)的平方+3(y-x)的立方

6*(x+y)^7-9*(x+y)^3*(x-y)^2*((3*x-3*y)*(x+y))^(1/2)ok?再问：可不可以写清楚点

2(y-x)²-7(x-y)+6(x-y)-3(y-x)²=-(y-x)²-(x-y)=-(x-y)²-(x-y)=-(x-y)[(x-y)+1]=(y-x)(

[(3x+4y)的平方-3x(3x+4y)]除(-6y)=（3x+4y)(3x+4y-3x)/(-6y)=(3x+4y)*4y/(-6y)=-(3x+4y)*2/3=-2/3*（3x+4y)

6(x-y)的三次方+12(x-y)的平方-3(y-x)的平方=6(x-y)³+12(x-y)²-3(x-y)²=6(x-y)³+9(x-y)²=3(

(x平方+y平方)平方-y平方=x平方+6所以（x²＋y²）²-（x²＋y²）-6=0（x²＋y²＋2）（x²＋y

(x的4次方y+6x的立方y的平方-x的平方y的立方）÷3x的平方y=x的4次方y÷3x的平方y+6x的立方y的平方÷3x的平方y-x的平方y的立方÷3x的平方y=1/3x²＋2xy-1/3

若是：①4x²-y²和②X/(3Y-6X),则公分母是3(y-6x)；若是：①1/(4x²-y²)和②X/(3Y-6X),①=1/[(2x-y)(2x+y)],

(2x-3y)的平方-(2x+3y)的平方=[(2x-3y)+(2x+3y)][(2x-3y)-(2x+3y)]=4x*(-6y)=-24xy∵x=1/6,y=1/8∴原式=-24*1/48=-1/2

（x+y)(x-y)+(x-y)的平方-(6X的平方Y-2XY的平方）/2Y=x²-y²+x²-2xy+y²-3x²+xy=-x²-xy

【2（x-y）²-8（x-y)²（x+y）+6y（x-y）²】÷2（x-y）²=2（x-y）²÷2(x-y)²-8（x-y)²（x

解(-3x²y)(-4x²y²-5y³-6x+1)=(-3x²y)(-4x²y²)+(-3x²y)(-5y³)

(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)/(2y)=X^2-y^2-y^2+X^2+y^2-2xy-3x^2+xy=-x^2-y^2-xy=-(x^2+y^2+xy-3

解(x-y)(x+y)-(x-2y)²+x(3x-5y)-(x-y)(x-2y)=(x²-y²)-(x²-4xy+4y²)+(3x²-5xy

3a(x-y)+9(y-x)=3(x-y)(a-3)x^2+y^2-1-2xy=(x-y)^2-1=(x-y+1)(x-y-1)(x+2)(x+6)+x^2-4=(x+2)(x+6)+(x+2)(x-

x(x-y)²-(y-x)³=x(x-y)²+(x-y)³=(x-y)²[x+(x-y)]=(x-y)²(2x-y)

[(3x-3y)/(y平方-x平方)+(x平方-2xy+y平方)/(x平方-y平方)-(x平方-x+6)/(x+2)]/(x+y)=【-3/(x+y)+(x-y)/(x+y)-(x-3)]】/(x+y

第一项与第三项先合并9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y^2*(x-y)(x+1)=(x-y)(x+1)(9xy+6y^2)-3y(x-y)(3x+2y)=(x-y)(x+1

答：3(x+y)²-7(x+y)+8(x+y)²+6(x+y)-11(x+y)²=(3+8-11)(x+y)²+(6-7)(x+y)=0-(x+y)=-x-y

（6x+2y)/(9x-3y)=6(6x/y+2)/(9x/y-3)=6,解得：x/y=5/12(3x+y)^2/(x^2-y^2)=(3x/y+1)^2/((x/y)^2-1)=(81/16)*(2

【(x-y)的3次方-8(x-y)的2次方(x+y)+6y(x-y)的平方】/2(x-y)的平方=(x-y)²[x-y-8(x+y)+6y]/2(x-y)²=1/2（x-y-8x-