8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
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8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
化简:方程1——8X-8y=3x+3y-12 方程2——6x+6y=8x-4y+16
1——5x-11y=-12 2——2x-10y=-16即x=5y-8
解方程:2带入1,解得x=2 y=2
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
12y(x-y)^2-8(x-y)^3=?
8x-8y-3x-3y=-12,6x+6y-8x+4y=16
填空题 x+y/4=x-y/6=3x+12y+5/8 x= y=
8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
8(x-y)=3(x+y)-12 6(x+y)=4(2x-y)+16
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
[2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
[12(x+y)^3+3(x+y)(x-y)^2]÷6(x+y)
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
4x-3y/x-2y÷6y-8x/y-2x
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项.
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6