二年级填上合适的数4X4一4=( ),5X3+5=( )X( ) ,3X2+3X2=( )X( ) ,2X4+2X2(
3个回答
4X4一4=4X(3)
5X3+5=(5)X(4) ,
3X2+3X2=(3)X(4)
2X4+2X2=(2)x(6)
相关问题
(x+3)(x-4)=8,(x+二根号3)(x-二根号三)=4,x(x+5)=2(x+4),(2x-5)(3x+4)=-
x1 + x2 + x3 + x4 + x5 = 7 4x1 + 2x2 + 3x3 + 2x4 - 2x5 = 5 x
3(x+2)/x-3+ x+3/x-2=4 1/x+1 + 2x/x+1=2 5x/x+2 + 3/x^2+4x+4=5
x1+5x2+2x3-4x4=3 -3x1-2x2+3x3+4x4=-6 -x1+3x2-x3-4x4=-2 -2x1+
(2x4-5x2-4x+1)-(3x3-5x2-3x)
x+5=4x-3 3/4x-2=x+1 6x+5=3x-7 -13x+4=-4x-5 -2/3x-3=5/4x+2 是方
.解线性方程组|X1+X2+X3+X4=5 |X1+2X2-X3+4X4=-2 |2X1-3X2-X3-5X4=-2 |
4(x+5)2=1444(x+5)2=144 (2x-1)2=x(3x+2)-7 4x2-3=4x
[(6-5x+x^2)/(x^2-16)]/[(x-3)/(4-x)]*[(x^2+5x+4)/(4-x^2)]
解线性方程组x1+x2+3x3+4x4=5 2x1+4x2+4x3+6x4=8 -x1-2x2-x3-2x4=-3