1.345*0.345*2.69-1.345^3-1.345^3*0.345^2help!_数学解答

1.345*0.345*2.69-1.345^3-1.345^3*0.345^2
help!

人气：190 ℃　时间：2020-03-30 15:15:45

解答

1.345×0.345×2.69-1.345³-1.345×0.345²
=1.345×(0.345×2.69-1.345²-0.345²)
=1.345×(-1)×(1.345²-2×0.345×1.345+0.345²)
=-1.345×(1.345-0.345)²
=-1.345×1²
=-1.345