(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算
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(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算没有的[(7.2x0
(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算
(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算
(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算
没有的
[(7.2x0.5)x68]~[(1.8x2.5)x2.3]
(7.2X68X0.5)÷(1.8X2.3X2.5)简便运算
若 x2-3x+1=0,求（2x2×x3-5x2×x2+2 x3-8x2 ）÷（x2+1 ）的值
5x2-3+2÷5=
9-2+8-6x2÷5
4x2.5x2+4x2×2+2x2.5x2=
15X2/5X2/5X2/5=
4x2-3y2+2xy-4x2+5x2
x2-5x+1=0则x2+x2/1
（4.8x7.5x8.1)÷(2.4x2.5x2.7)怎么简便计算
(4.8x7.5x8.1)÷（2.5x2.7x2.4)简算
已知X2 /X2-2 =1/1+√3-√5求÷的值
2+5x2+5x2=?
1.5x2.5+2.5x2.5简算
不等式(x2-4x-5)(x2-8)
x2-1/x2-5x+6
3x2.5x2 =多少?
maxz=2x1+x2,5x2
5(x2-x)=3(x2+x)