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(3√3-2√2)²= 9*3-12√6+4*2= 27-12√6+8= 35-12√6
b) 1- 10/3*9/25+1/8*2= 1- 90/75+1/4= 1- 18/15+1/4= 1-6/5+1/4= -1/5+1/4= -4/10+5/20= 1/20
1/20*210%= 1/20*2,1= 0,105
zadanie 2
a) x= 1/2
b)x= 3
c) 3x-5=4
3x=9/:3
x=3
d)2(x-2)= (x-5)²
2x-4=x²-10x+25
-x²+12x-29=0
Δ=144-116
Δ=28
x= -12-√28/-2
x=-12+√28/-2
zad.3
a) x= -6
b) x=3
c) x=27/64