xx+xy -6yy+x+13y-6 因式分解

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x*x+xy -6y*y+x+13y-6 因式分解
x*x+xy -6y*y+x+13y-6 因式分解

x*x+xy -6y*y+x+13y-6 因式分解
答”
x^2+xy-6y^2+x+13y-6
=x^2+(y+1)x-(6y^2-13y+6)
=x^2+(y+1)x-(3y-2)(2y-3)
=[x+(3y-2)]*[x-(2y-3)]
=(x+3y-2)(x-2y+3)

x*x+xy -6y*y+x+13y-6
=（x-2y)(x+3y)+x+13y-6
=(x-2y+3)(x+3y-2)

x^2+xy-6y^2+x+13y-6
x^2+xy-6y=[x+3y][x-2y]
所以设原式=[x+3y+m][x-2y+n]
=[x+3y][x-2y]+n[x+3y]+m[x-2y]+mn
=[x+3y][x-2y]+[n+m]x+[3n-2m]y+mn
则有：
m+n=1
3n-2m=13
mn=-6
m=-2
n=3
所以原式=[x+3y-2][x-2y+3]

x方+xy-6y方+x+13y-6 x^2+xy-6y^2+x+13y-6 因式分解：3xy(x-y)+6y(y-x) 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) 3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少? 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 x*x+xy -6y*y+x+13y-6 因式分解 x*x+y*y+4x-6y+13=0求xy=? (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 6x^-13xy+6y^因式分解 |x|/x+y/|y|+xy/|xy|= 已知x+y=6,xy=7,试求x*x+y*y,x*x-y*y的值已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y x^2-xy-6y^2+3xy+y+2 x^2+xy-6y^2-3x+6y x²+3xy+2y-x+y-6因式分解 2x^2+3xy+y^2+x-y-6