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

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

2个回答

填空（x-y）（x2+xy+y2）=______；（x-y）（x3+x2y+xy2+y3）=______
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
(3x^2y^3)/(2xy)^2=?(3x^2y^2)/(xy)*(1/y)=?x^2y-5x^2y+3x^y=?(6
因式分解：x(y-3)-(2y-6) (x+y)^3-(x-y)^2(x+y) x(x^2-xy)-(4x^2-4xy)
[x(x^2 y^2-xy)-y(x^2-x^3y)]÷3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]3x^2y计算,
[x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y)
【xy(x²-3y)+3xy²】(-2xy)+x³y²(2x-y)
已知x^3+y^3=(x+y)(x^2-xy+y^2)称为立方和公式,x^3-y^3=(x-y)(x^2+xy+y^2)
x+y=-3 xy+x+y=-2 x/y+y/x=?