1.(-x/y)^2*(-y^2/x)^3/(-xy^4) 2.把x^5,x+1/x和1+2/x+3/x^2乘起来得到一
1:(x+1)(x+3)(x+5)(x+7)+152:x^2-2xy+y^2-13x+13y+303:先把4(x+2z)
是关于因式分解的``1.计算x×x×x×x+5×x×x-6(x+y)(x+y+2xy)+(xy+1)(xy-1)2.已知
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
-3xy(x^2-2x-1)+(2x-3y)(3x-4y)=?
(3y-6)(-y) (-3x)(4x²-4/3x+1) (-xy)(2x-5y-1) 5x(2x+3)+x(
1.若x分之1-y分之1=2,则求x-xy-y分之3x+xy-3y=0的值.2.设x,y为实数,且x-y=3.求x乘根号
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
通分:(1)x/(x^2+2xy+y^2)与y/(x+y) (2)(x+4)/(x^2+4x)与(x-5)/x(x-5)
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8