通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9
通分.2x+6y/(x-3y), x/(x-9y^2), 1/(x^2-6xy+9y^2),就这一题了
初二数学通分问题2x+6y/x—3y和x/x—9y²和1/x²6xy+9y²
求通分 2x+6y/x-3y,x/x-9y²,1/x²-6xy+9y²
Y.
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
1.5y+8y-6y=2y-3
1- 6y+y²
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
计算[1]y+2分之y的平方-6y+9除以[3-y] [2] x的立方分之x的平方y乘以[-y分之1]
x+y=3 x+2y=9 3/x+1=y y-x=3 y=2x-3 y-3x=1 2(x+1)-y=6 7x-5y=-9
1 :y 2:3x+y 3:6x+y 4;9x+y n是什么?不是很简答!