Oblicz wartości liczbowe wyrażeń :
a) (1/2 x + 2 b ) razy 3 x = -4 b = 1/2
b) ( - 4 ab - 3 ) do potęci 2 a = - 1/8 b = 4
c) 1/2 a - 4 b a = 2 b= 1/8
d) ( 4 x - 2 y ) razy 3 x = 4 y = 2
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a) =(1/2*(-4)+2*1/2)*3=(-2+1)*3=-3
b) =(-4*(-1/8)*4-3)^2=(2-3)^2=(-1)^2=1
c) =1/2*2-4*1/81-1/2=1/2
d) =(4*4-2*2)*3=(16-4)*3=12*3=36
*- razy
^2- do potęgi 2