16a²b³ -8a^5b=8a²b(2b²-a³)
100x^4 y^5 - 25x³y³=25x³y³(4xy² - 1)
14x^6 y² -28x³y=14x³y(x³y -2)
-12=(-3)·4
(-12)·(-12)·(-12)=(-3)³·4³
(-3)·(-3)·(-3)·(-3)=(-3)⁴=3⁴
![\frac{4\cdot 4\cdot (-12)\cdot(-12)\cdot(-12)\cdot 9}{32\cdot (-3)\cdot (-3)\cdot (-3)\cdot (-3)} = \frac{4^2\cdot (-3)^3\cdot 4^3\cdot 3^2}{4^2\cdot 2\cdot (-3)^4} = \\ \\ = -\frac{3^5\cdot 4^5}{2\cdot 4^2\cdot 3^4} =- 96](https://tex.z-dn.net/?f=+%5Cfrac%7B4%5Ccdot+4%5Ccdot+%28-12%29%5Ccdot%28-12%29%5Ccdot%28-12%29%5Ccdot+9%7D%7B32%5Ccdot+%28-3%29%5Ccdot+%28-3%29%5Ccdot+%28-3%29%5Ccdot+%28-3%29%7D+%3D+%5Cfrac%7B4%5E2%5Ccdot+%28-3%29%5E3%5Ccdot+4%5E3%5Ccdot+3%5E2%7D%7B4%5E2%5Ccdot+2%5Ccdot+%28-3%29%5E4%7D+%3D+%5C%5C++%5C%5C+%3D+-%5Cfrac%7B3%5E5%5Ccdot+4%5E5%7D%7B2%5Ccdot+4%5E2%5Ccdot+3%5E4%7D+%3D-+96)
(5А²-2А-3)-(2А²+2А-5)=
=5А²-2А-3-2А²-2А+5=
=3А²-4А+2
А)240*1:100=2,4
б)15*40:100=6
в)8*120:100=9,6
г)280*9,5:100=26,6