2X三次方Y-4X二次方Y二次方 2XY三次方-搜答案-搜狗做题网

x^2=y+4,所以x^2-y=4y^2=x+4,所以y^2-x=4x^3-2xy+y^3=（x^3-xy）+（y^3-xy）=x（x^2-y）+y（y^-x）=4x+4yx^2=y+4,y^2=x+

解题思路：本题利用整式的乘方运算可求结果。解题过程：你好！题目的详细解答请看附件中的图片，如有疑问请与我联系，我会尽快答复，祝你学习愉快！最终答案：略

(x+3)^2-(x-1)(x-2)=x^2+6x+9-(x^2-3x+2)=x^2+6x+9-x^2+3x-2=9x+7(x^2y)^3*(-2y^2)^2÷(2x^2)=(x^6y^3)*(4y^

ax^3y+axy^3-2ax^2y^2=axy(x^2+y^2-2xy)=axy(x-y)^22x^2-12x+18=2(x^2-6x+9)=2(x-3)^24X^2-9=(2x+3)(2x-3)4

-4x的平方+16x=-4x(x-4)-4x的三次方y+16x的二次方=-4x²（xy-4）y的二次方-16xy的三次方=y²（1-16xy）提示：因式分解,运用提公因式法

原式=x平方y(x平方+xy+1/4y平方)=x平方y(x+Y/2)平方再开方=x根y成(x+Y/2)=7√2/36

=x^4+y^4-2x^2y^2-x^4+y^4=2y^4-2x^2y^2

再问：谢谢大神再答：有问题继续密我

x的平方y再答：公因式就是共有的东西再问：在问一下（x+y-z）（x-y+z）-（y+z-x）(z-x-y)的公因式是什么再答：x+y-z再答：把负号放到(z-x-y)里再问：哦

（y-x）的二次方(x-y)+(x-y)的三次方＋2(x-y)的二次方(y-x）=（x-y）²(x-y)+(x-y)³-2(x-y)²(x-y）=(x-y)³+

-x^4+x^2y^2=x^2(y^2-x^2)=x^2(y+x)(y-x)xy^3-2x^2y^2+x^3y=xy(y^2-2xy+x^2)=xy(x-y)^2

(x-2y)2*(2y-x)3=(x-2y)2*(2y-x)2*(2y-x)=(x-2y)2*(x-2y)2*-(x-2y)=-(x-2y)5结果等于－(x-2y)的5次方

答：x=-1,y=2(3x²y-2xy²)-(xy²-2x²y)-(3x²y²+2x²y)-(-3x²y²-2

(4x的三次方y+6x的二次方y的二次方-xy的三次方)÷2xy=xy(4x²+6xy-y²)÷2xy=2x²+3xy-0.5y²

x+y的三次方*x+y的二次方=(x+y)^3(x+y)^2=(x+y)^(3+2)=(x+y)^5

原式=x²y(x-y)²-2xy(x-y)²=xy(x-y)²(x-2)再问：原式=x²y(x-y)²-2xy(y-x)²再答：对

=(x^2)(y^2)(7y-8xz)/(8x^2*y^2)=7y/8-xz

x^3+x-y^3-y=(x^3-y^3)+(x-y)=(x-y)(x^2+xy+y^2)+(x-y)=(x-y)(x^2+xy+y^2+1).x^3-x^2-y^3+y^2=(x^3-y^3)-(x

x(x-y)^2-2(y-x)^3把(y-x)^3变为-(x-y)^3原式变为：x(x-y)^2+2(x-y)^3提出公因式(x-y)^2原式变为：(x-y)^2[x+2(x-y)]把后面这项展开原式