计算:4x³÷(-2x)²-(2x²-x)÷(1/2x)=
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计算:4x³÷(-2x)²-(2x²-x)÷(1/2x)=
计算:4x³÷(-2x)²-(2x²-x)÷(1/2x)=
计算:4x³÷(-2x)²-(2x²-x)÷(1/2x)=
原式=4x²÷4x²-x(2x-1)÷(1/2x)
=1-2(2x-1)
=-4x+3
4x³÷(-2x)²-(2x²-x)÷(1/2x)
= 4x³(1/4x²)-x(2x-1)*2(1/x)
=x-4x+2
=-3x+2