(1/2)^(x+4)=(1/(2^4))^4
2^(-(x+4))=2^(-4*4)
-x-4=-16
-x=-12
x=12
проверка
(1/2)^16=(1/(2^4))^4=(1/2)^16
6,56 -5,56 + 7,5 - 4,2 + 7, 89 = 1 + 3,3 + 7,89 = 4,3 + 7,89 = 12,19
7*-4=-28
-14 * -4= 56
7 * 1,5= 10,5
-14 * 1.5 = -21
5x - 5y + ( X - y )^2 = 5 * ( X - y ) + ( X - y )^2 = ( X - y )*( 5 + X - y )
B4=54, b3 = 54:3=18, b2=18:3=6, b1=6:3=2
2+6+18=26