先化简,后求值（-4x²）÷（-2x）+12x³y²÷（-4x²y）-24x四次方y³
÷（-4x³y²）,其中x=-2,y=4分之1
人气：430 ℃ 时间：2019-10-24 13:02:04
解答
（-4x²）÷（-2x）+12x³y²÷（-4x²y）-24x四次方y³÷（-4x³y²）
=2x-3xy+6xy
=2x+3xy
=-2x2-3x2x1/4
=-4-3/2
=-5.5
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