x^2-2xy-3y^2+3x-5y+2如何因式分解?
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x^2-2xy-3y^2+3x-5y+2如何因式分解?
x^2-2xy-3y^2+3x-5y+2如何因式分解?
x^2-2xy-3y^2+3x-5y+2如何因式分解?
用待定系数法,先分解x^2-2xy-3y^2=(x-3y)(x+y)
那么原式=(x-3y+A)(x+y+B)=x^2-2xy-3y^2+Ax+Ay+Bx-3By+AB
A+B=3
A-3B=-5
A=1
B=2
原式=(x-3y+1)(x+y+2)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
X^Y-2XY^2+y^3
-x^5y-xy+2x^3y
x²-y²+5x+3y+4(x+y-2xy)(x+y-z)+(xy-1)²
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y)
-xy^2(x+y)^3+x(x+y)^2因式分解
(x+3y)/(x^2+xy)-x+y计算题
x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x,
已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y