8(3-2a) - 2(3a+5) - 3(5-a) = 24 - 16a - 6a - 10 - 15 +3a = -19a - 25
Объяснение:
5+2 1/3:(-9,8)-5:(-21) =5/42
2 1/3:(-9,8)=7/3:(-9 4/5)=7/3:49/5=-(7*5)/3*49=-5/21
-5/21:(-21)=5/21*1/21=5/42
<span>Решение: √112=</span><span>√16*7</span>=4<span>√7</span>