1.a-(2a+b)+(3a-4b)=_____________.2.多项式____与m²+m-2的和是m²-2m3.4x2-[6x-(2x-3)+2x2]=_____________. 4.(8x²y-xy²)-4(x²y-4分之1xy²)_____________7.化简n-mn-3(-m-n)-(-m)-11填空
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1.a-(2a+b)+(3a-4b)=_____________.2.多项式____与m²+m-2的和是m²-2m3.4x2-[6x-(2x-3)+2x2]=___________
1.a-(2a+b)+(3a-4b)=_____________.2.多项式____与m²+m-2的和是m²-2m3.4x2-[6x-(2x-3)+2x2]=_____________. 4.(8x²y-xy²)-4(x²y-4分之1xy²)_____________7.化简n-mn-3(-m-n)-(-m)-11填空
1.a-(2a+b)+(3a-4b)=_____________.2.多项式____与m²+m-2的和是m²-2m
3.4x2-[6x-(2x-3)+2x2]=_____________. 4.(8x²y-xy²)-4(x²y-4分之1xy²)_____________
7.化简n-mn-3(-m-n)-(-m)-11
填空
m2-2n2减去5m2-3n2+1的差为________.
1.a-(2a+b)+(3a-4b)=_____________.2.多项式____与m²+m-2的和是m²-2m3.4x2-[6x-(2x-3)+2x2]=_____________. 4.(8x²y-xy²)-4(x²y-4分之1xy²)_____________7.化简n-mn-3(-m-n)-(-m)-11填空
1.2a-5b
2.2-3m
3.2x²-4x-3
4.4x²y
7.4m+4n-mn-11
n²-4m²-1
2,3a.b >_^
若A={1,2,3,4},B={a,b,c} ,a,b,c属于R ,则A 到B 的映射有 _ 个,B 到A 的映射有 _ 个,A 到 B的函数有
已知1/a+1/b=4,则a-3ab+b/2a+2b-7ab=_
(2a-b)(a+_)=2a的平方-3ab+b的平方
初二分式填空(1)2-x/-x^2+3=(_)/x^2-3.(2)(a-b)(a+2b)/a^2-b^2=(_)/a+b
若极限lim((3n^2+4)/(n+2)-an+b)=6,则a=_,b=_
若2a-5=3-3b,则2a+3b=_?
若a、b互为相反数,则3a-4+3b=_-_______.
因式分解:a²-b²-2b-1=_
多项式3a^-2b+3是由单项式_,_,_组成的
c语言 执行下述语句后,a,b,m,n变量的值分别为_执行下述语句后,a,b,m,n变量的值分别为_ int a=1.b=2,c=3,d=4,m=5,n=6; a = ( m=a>b ) && ( n =c>d ) || ++a = = b--;
已知b分之a=3则a分之a-b的值是_
已知(a+b)² =3,(a-b)² =2,则a² +b²=_,ab=_.已知(a+b)2 =3,(a-b)2 =2,则a2 +b2 =_,ab=_.
若三角形ABC的周长为18cm且a+b=2c,b=2a,则a=_,b=_,c=_.
a,b∈R+,且a+b=4,则ab的最大值是_;a²+b²有最_值,且此值是_
集合间的基本关系1.用适当的符号(∈,∉,=,⊂下面有≠,⊃下面有≠)3_{1,2,3,4,5};5_{5};a_{a,b,c};{a,b,c}_{b,c};Φ_{0};{x丨x是矩形}_{x丨x是平行四边形};{1,2,3}_{3,2,1};{2,4,6,8}_{2,6}2.已知集合A={x丨-
若1/2a+b=2b+c,则3(a+2b)_2(c+3b)+(2a_4b)_(4a_2b)=
(2a-1)2+|7-3b|=0,则a=_,b_