xy-x^2/(x-y)^2=x/x-y对不对?不对写出正确答案
xy-x^2/(x-y)^2=x/x-y对不对?不对写出正确答案
下列各式对不对?如不对,写出正确答案:(1)a^2-2a+1 / 1-a=1-a. (2)3x-4y / 8xy-6x^
如不对,写出正确答案 a^2-2a+1/1-a=1-a 3x-4y/8xy-6x^2=1/2x 谢
如不对,写出正确答案1.a^2-2a+1/(1-a)=1-a 2.3x-4y/(8xy-(6x^2))=1/2x
(xy-x^2)乘以(xy)/(x-y)
(x^2+xy/x-y)/(xy/x-y)计算
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
因式分解:x×x-xy-2y×y-x-y
(x+2)(x+3)+x^2-5x-8 x^3-x^2y-xy^2+y^3 18x^2-21xy+5y^2因式分解(写出
x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2
作乘法:(x+y)(x^2-xy+y^2);(x-y)(x^2+xy+y^2)
x^2+xy+x=36,y^2+xy+y=20,求x+y.