1.[4a²b²(3b²-5ab)-a²(-2b)³]÷8a²b³
=[12a²b^4-20a³b³-a²*(-8b³)]÷8a²b³
=[12a²b^4-20a³b³+8a²b³)]÷8a²b³
=3/2 b-5/2 a+1
2.(5x10^5)x(-6x10^-2)÷(-1/2x10^-2)
=(-30×10³)÷(-1/2x10^-2)
=60×10^5
=6×10^6
1.[4a²b²(3b²-5ab)-a²(-2b)³]÷8a²b³
=[12a²b^4-20a³b³-a²*(-8b³)]÷8a²b³
=[12a²b^4-20a³b³+8a²b³)]÷8a²b³
=3/2 b-5/2 a+1
2.(5x10^5)x(-6x10^-2)÷(-1/2x10^-2)
=(-30×10³)÷(-1/2x10^-2)
=60×10^5
=6×10^6