2)log4(8)+log4(32)=log4(8*32)=log4(256)=4, так как 4^4=256
3)log4(10)+log4(1/640)=log4(10*(1/640))=log4(1/64)=-3
4)log3(6)-log3(2/27)=log3(6:2/27)=log3(6*27:2)=log3(81)=4
5)log5(20)-log5(500)=log5(20:500)=log5(1/25)=-2
504 = 2 * 2 * 2 * 3 * 3 * 7 = 2³ * 3² * 7
-13m^3+10m^2+12
--------------------------- -20
3
Формула х первого и второго =-б-+√D/2a
1) 36-21-4=11
2) 47-3+15=59