Ответ:
Объяснение:
1) 52+4/2= 52+2=54
2) 7/3 -2/3=5/3 = 1 2/3
3)37+7=44
4) 2/5-5 =2/5-10/5=-8/5= - 1 3/5
64a³-27b⁶=(4a)³-(3b²)³=(4a-3b²)((4a)²+(4a)*(3b²)+(3b²)²=
=(4a-3b²)(16a²+12ab²+9b⁴)
(3n+2)³+(4n+5)³= (3n+2+4n+5)((3n+2)²-(3n+2)(4n+5)+(4n+5)²)=
=(7n+7)((3n+2)²-(3n+21)(4n+5)+(4n+5)²)=
=7(n+1)((3n+2)²-(3n+2)(4n+5)+(4n+5)²).