2 3 4 6 8 12 x y 22 48 x y是什么
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]/2(x-y)^2的解题过程是什么
{3X+2Y=22 5X+4Y=28 {4X+3Y=12 5X+2Y=11 {6X+5Y=21 5X+8Y=22 二元一
化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
1 :y 2:3x+y 3:6x+y 4;9x+y n是什么?不是很简答!
计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
①x+y+z=6 3x-y+2z=12 x-y-3z=-4 ②x+y-z=2 4x-2y+3y+8=0 x+3y-2z-
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20