1.(2x-3y)^2=( )
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/29 14:15:22
1.(2x-3y)^2=( )
2.(1/4a+2/5b)^2=( )
3.用完全平方公式计算197^2=( )^2=( )=( )
4.-4xy^2÷(-xy)=( ),15m^2÷5m^2=( )
5.A÷2ab^2=-1/3a^2b,则A=( )
6.若(-7m+A)(4n+B)=16n^2-49m^2,则A=( ),B=( )
2.(1/4a+2/5b)^2=( )
3.用完全平方公式计算197^2=( )^2=( )=( )
4.-4xy^2÷(-xy)=( ),15m^2÷5m^2=( )
5.A÷2ab^2=-1/3a^2b,则A=( )
6.若(-7m+A)(4n+B)=16n^2-49m^2,则A=( ),B=( )
![1.(2x-3y)^2=( )](/uploads/image/z/4623250-58-0.jpg?t=1.%282x-3y%29%5E2%3D%28+%29)
1.(2x-3y)^2=( 4x^2-12xy+9y^2 )
2.(1/4a+2/5b)^2=( 1/6a^2+1/5ab+4/25b^2 )
3.用完全平方公式计算197^2=( 200-3 )^2=( 40000-1200+9 )=(38809 )
4.-4xy^2÷(-xy)=( 4y ),15m^2÷5m^2=( 3 )
5.A÷2ab^2=-1/3a^2b,则A=( -2/3a^3b^3 )
6.若(-7m+A)(4n+B)=16n^2-49m^2,则A=(4n ),B=( 7m )
2.(1/4a+2/5b)^2=( 1/6a^2+1/5ab+4/25b^2 )
3.用完全平方公式计算197^2=( 200-3 )^2=( 40000-1200+9 )=(38809 )
4.-4xy^2÷(-xy)=( 4y ),15m^2÷5m^2=( 3 )
5.A÷2ab^2=-1/3a^2b,则A=( -2/3a^3b^3 )
6.若(-7m+A)(4n+B)=16n^2-49m^2,则A=(4n ),B=( 7m )
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
1.y=e^(4xsin2x) 求导 2.x^3(x+y)=y^2(2x-y)求导 3.e^(x/y)=2x-y求导
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(2x+3y)^2-(2x+3y)(2x-3y),其中x=3,y=1.
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值
先化简 在求值1.(2x+3y)^2-(2x+y)(2x-y),其中x=三分之一,y=二分之一2.[(x-y)^2+(x
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
1.若2x-3y=0,则x+y/x-y(是个分数额)=( )
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2