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b) 1/2-1/2:10=1/2-1/20=10/20-1/20=9/20
d) pierw 3*pierw 21 1/3= pierw 3*pierw 64/3= pierw 3*8/pierw 3= 8
e)1/9 ^14* 9^14=1/9 ^14*1/9 ^-14= 1/9 ^0=1
f)31/3/1/4=31/3*4=124/3
g)pierw (100*36)= pierw 3600=60
h)2^-2 -2^-3= 1/4-1/8=2/8-1/8=1/8
zad.2
a)4x-(x-1) -2 (1-x)=4x-x+1-2+2x=5x+1
5x+1=0
5x=-1
x=-1/5
b)(x+6)(x-3)=x^2-3x+6x-18=x^2+3x-18
delta=9+72=81 pierw 81=9
x1= (-3+9)/2=3
x2=(-3-9)/2=-6
zad.3
a) 2x/3=1 /*3
2x=3 /:2
x=3/2= 1 1/2