3x²-xy-4y²-3x+4y=0 因式分解可得 (3x-4y)(x+y-1)=0
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
因式分解:(x-y)(3x-7y)²-4(x-y)(x+y)²
已知X²+3XY-4Y²=0(Y≠0)求X-Y/X+Y
(x-y)^3-(x-y)^4 因式分解
已知x,y满足x²+y²-4x-6y+13=0,求(- y/x^3)^3÷(- 1/xy)^4.(x
(x-y)²-(3x-3xy+y²)因式分解
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x,y>0 2x+y+3=xy 求5x+4y最小值
因式分解x^4y-x^2y^3+x^3y^2-xy^4
(x+y)-(x+y)平方 因式分解 解方程 2x²=3x (3x-1)² - 4=0 5x-15x
因式分解4xy^2-4x^2y-y^3