5x^2+6xy+5y^2-30x-8=0是哪种圆锥曲线方程式?
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5x^2+6xy+5y^2-30x-8=0是哪种圆锥曲线方程式?
5x^2+6xy+5y^2-30x-8=0是哪种圆锥曲线方程式?
5x^2+6xy+5y^2-30x-8=0是哪种圆锥曲线方程式?
a(x-m)^2+b(x-m)(y-k)+C(y-k)^2=f^2中
deta=b^2-4ac=0 为两条直线.
deta>0时,双曲线.
a>0 deta
明显的椭圆
诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy)
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值
2x^+xy-y^-4x+5y-6=?
已知xy/x+y=2,求代数式8x-5xy+8y/-x+3xy-y的值
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2
5x^2+8xy+5x^2+6x+5=0求X Y
因式分解30题(要过程)am+an+bm+bn x^2+5y-xy-5x x2+xy+2xz+x (a+b)x-(b+a)y -12x(x-y)-(y-x)x^2 2x^2+4x+2 x(x+z)-y(y+z) 2(x^2-3ab)+x(4a-3b) 4x^2+12xy+9y^2-25 x^4-16 16x^4-1 x^2+9x+8 x^2-10xy+24y^2 2x^2+15xy-8y^2 3x^2-6xy+3y^2 24x^2+22x-21 -x^2+4xy-
已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值
已知X+Y=6,XY=4,求(5X-4Y-3XY)-(8X-Y=2XY)的值
已知X+Y=6,XY=-4,求(5X-4Y-3XY)-(8X-Y+2XY)的值
X+y=6,xy=-4,求(5x-4y-3xy)-(8x-y+2xy)的值
喏x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 要全过程
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
3x²-2xy-y²+2x+6y=8,2x²-3xy-5y²+3x+17y=14
若x+y=5,xy=6,求x^2y+xy^2的值
xy=6,x-y=5,x^2y+xy^2