填一填:(1)1,4,9,y,25,36 y=(2)2,4,6,10,x,26 x=
【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,求4X/4X²-Y&
因式分解 (1).(x+y)(x+y-6)+9 (2).x²-16y²-x-4y
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
已知2x-y=10,求((x+y)-(x-y)+2y(x-y))÷4y的值
已知4x^2+y^2-4x-6y+10=0,求(2\3x根号9x+y^2根号x/y^3)-(x^2根号(1\x)-5x根
(2X-Y)²-4(X-Y)*(X+Y)-(X-Y)*(X-1)
已知4x=9y求(1)x+y/y (2)y-x/2x
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
解下列方程组:(1)4x+10y=36 15x-10y=8 (2)x-2y=3 3x-8y=13 (3)2x-y=6 x