(x-2y)4次方 x(x-y)3次方-y(x-y)3次方-搜答案-智慧作业帮

（2x-y)(2x+y)(4x^2-y^2)=(4x^2-y^2)*(4x^2-y^2)=(4x^2-y^2)^2

6xy³-9x²y²-y^4=-y²(-6xy+9x²+y²)=-y²[(3x)²+2×3x×(-y)+(-y)&sup

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

(x-y)的2次方-2(x-y)+(x-y)-5(x-y)=(x-y)²-2(x-y)+(x-y)-5(x-y)=(x-y)²-(x-y)-5(x-y)=(x-y)²-6

很高兴喂你解答!原式=4√[(x^2+xy+y^2)/(x-y)*1/2√[(x^2-xy+y^2)/(x+y)*3√(x^3+y^3)=6√[(x^2+xy+y^2)/(x-y)*√[(x^2-xy

x^5-2x^3y^2+xy^4=x(x^4-2x^2y^2+y^4)=x(x^2-y^2)^2=x(x+y)^2(x-y)^2

(x-y)(z+y-x+y+2y)÷4y=(x-y)(z-x+4y)÷4y{(x+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y=(x-y)(x+y-x+y+2y)÷4y=(x-y)(4

根据绝对值和完全平方数的意义,两个只能是都为0.所以x+y+4=0x-y=0x=y=-2（-2y）*x^2=16

y(x+y)+(x+y)(x-y)-x的2次方,其中X=-2,y=2分之一y(x+y)+(x+y)(x-y)-x的2次方=(x+y)(y+x-y)-x=x(x+y)-x=x(x+y-1)=-2*(-2

原式=[2x/(x-y)]*[y/(x+y)]-[x^4/(x^4-y^4)]/[x^2/(x^2+y^2)]^2=2xy/(x^2-y^2)-(x^2+y^2)^2/[(x^2+y^2)(x^2-y

2(x-y)-(x-3y)=1/22x-2y-x+3y=1/2∴x+y=1/24的x次方×2的y次方×2的y次方-2×2的2x次方×2的2y次方=2的2x次方×2的2y次方-2×2的2x次方×2的2y

原式=(x+y)(x-x+y)-y^2=y(x+y)-y^2=y(x+y-y)=yx=4^2011×(1/4)^2010=(4×1/4)^2010×4=4

解原式=(x^2+y^2)-(xy)^2=(x^2+xy+y^2)(x^2-xy+y^2)

因为x^2+y^2+13＝6x-4y即有x^2-6x+9+y^2+4y+4=0即（x-3)^2+(y+2)^2=0故有：x=3y=-2因此（2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2

原式=2y(x-y)²+4y²(x-y)³=2y(x-y)²[1+2y(x-y)]=2y(x-y)²(2xy-2y²+1)原式=(m-n)&

x(x+2y)(x-2y)

4y(y-x)的2次方-6y(x-y)三次方=4y(x－y)²－6y(x-y)³=2y(x－y)²(2－3x＋3y)【提取公因式2y(x－y)²】

(-x+2y)(x的4次方+4x的2次方y的2次方+16y的4次方)(x+2y),求因式分解=（-x+2y)(x²+4y²)²(x+2y)=(4y²-x

=(x-y)³-2(x-y)³+3(x-y)³=2(x-y)³

你好!主要考察完全平方公式原式=（x^4+y^4）(x^2+y^2)(x^2--y^2)=(x^4+y^4)(x^4--y^4)=x^8--y^8不懂可以继续追问,望采纳,谢谢!