-3x四次方y²÷-(-xy负一次方)²-搜答案-智慧作业帮

(x-y)^3=x³--3x²y+3xy²-y³得-3x²y+3xy=²(x-y)^3-(x³-y³)原式=x(x&su

(1/x+1/y)^2=251/x^2+2/xy+1/y^2=251/x^2+1/y^2=27(1/x^2+1/y^2)^2=7291/x^4+1/y^4+2/x^2y^2=7291/x^4+1/y^

（3x平方y）平方·（-15xy立方）÷（-9x四次方y平方）=9x^4y²(-15xy³)÷(-9x^4y²)=-135x^5y^5÷(-9x^4y^2)=15xy&#

由题得x^2y^4=(xy^2)^2=(3/2)^2=9/4

原式=x的5次方+4x的4次方-5xy的4次方+6x³y的4次方-6x²y³-3y的5次方排序为：x的5次方+4x的4次方+6x³y的4次方-6x²y

您好：x的负二次方Y的负三次方乘（-3y的负一次方Y平方）平方÷（2xy负二次方）三次方=x的-2次方Y的-3次方乘9x的-2次方Y的4次方÷8x³y-6次方=9x的-4次方y÷8x

先把X四次方-2Y四次方-3XY二次方+X二次方Y+2XY二次方+3Y四次方合并同类项,也就是X四次方+Y四次方-XY二次方+X二次方Y,提取负号变成（X四次方+Y四次方）-（XY二次方-X二次方Y）

[-XY/(X-Y)^2]^4*[(Y^2-XY)/X]^3*(X^4/Y^10)÷[X/(XY-Y^2)]^5=-[X^4Y^4*Y^3(X-Y)^3*X^4*Y^5(X-Y)^5]/[(X-Y)^

x四次方y四次方-2x²y²-3x四次方y四次方=-2x四次方y四次方-2x²y²=-2x²y²(2x²y²+1)

(y的-2次方分之3x的4次方)的-3次方=(3x的4次方y的2次方)的-3次方=[(3x的4次方y的2次方)分之1]的3次方=(27x的12次方y的6次方)分之1

x四次方-y四次方/x平方-2xy+y平方=(x²+y²)(x+y)(x-y)/(x-y)²=(x²+y²)(x+y)/(x-y)

原式=[(x²+xy)+y²][(x²+xy)+3y²]+y^4=(x²+xy)²+4(x²+xy)y²+3y^4+y^

解-1/3x(xy²+y+x³y的4次方)=-1/3x[(xy)y+y+(xy)³×y]=-1/3x(y+y+y)=-1/3x*3y=-xy=-1

原式=x²/y²×(-y^6/x³)×(-1/xy^4)=x³/(x³*x)*y^6/(y²*y^4)=1/x*1=1/x

[3(x^4)y+2(x^2)(y^2)]/(x/2)*(2/x)=3(x^4)y+2(x^2)(y^2)]*[4/(x^2)]=12(x^2)y+8y^2

xy-1/2(x²y²)-1/3(xy)-1/2(x²y²)+x^4y^4=2/3(xy)-x²y²+x^4y^4这应该是最简的了

x²+2xy+y²+x⁴-y⁴=(x+y)²+(x²+y²)(x²-y²)=(x+y)²+(x&

=xy(1-2y^2)=-0.119616

99^2=(100-1)^2=100^2-2*100+1=10000-200+1=90801123^2-122*124=123^2-(123-1)(123+1)=123^2-(123^2-1)=110