(x-y)^2-10(y-x)+25
x(x-y)-y(y-x)+(x-y)²因式分解
(x-y)(2x+3y)-3(x+2y)(x-2y)分解因式
25(x-y)²-10(y-z)+1因式分解
(2x-3y)(2x+4y)-(3x+2y)(3x-2y)
分解因式(x+y)3次方-y(x+y)平方+x平方(y+x)
因式分解x²(x-2y)+y²(2y-x)
(2x+y)²-y(y+4x)-8x等于?
已知x²+y²+2x-6y+10=0,求x∧y的值
(5x^3-7x^3y+3x^2y)+2x^3-(-7x^3y+3x^2y+7x^3)
x²+y²+6x-8y+25=0 求分式y/x+x/y-2的值
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
已知x和y满足x+3y+|3x-y|=19,2x+y=6,求x,y的值