x^2+y^2+6y-2xy-6x+9
1个回答
原式=(x²-2xy+y²)-6x+6y+9
=(x-y)²-6(x-y)+9
=(x-y-3)²
相关问题
(3xy-9x2-2y2-6xy)-(6x2+2xy-3xy-y)
6x-6y-9x^2+18xy-9y^2-1
分解因式:x2-2xy+y2-6x+6y+9
已知x^2-2xy+2y^2+6x-6y+9=0求x y
因式分解: x^2-3x+6xy+9y^2-9y
x^2-6xy+9y^2-3x+9y 因式分解
-9y^2+6xy-x^2
约分:x²+y²-9-2xy/x²-y²+6x+9
2x-3y/xy×2x^2y^2/6x-9y
(2y-3x)(4y^2+6xy+9x^2)