化简求值[2x(2y-1)]*[2x+(2y-10]-(4y+x)(4x-y),其中x=2,y=-1化简求值[2x-(2y-1)]_数学解答

化简求值[2x(2y-1)]*[2x+(2y-10]-(4y+x)(4x-y),其中x=2,y=-1
化简求值[2x-(2y-1)]*[2x+(2y-1)]-(4y+x)(4x-y),其中x=2,y=-1

人气：314 ℃　时间：2019-12-19 14:37:56

解答

原式＝（4XY-2X)*(2X+2Y-1)-16XY-4X*X+4Y*Y+XY
=8XXY-4XX+8XYY-4XY-4XY+2X-16XY-4XX+4YY+XY