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2) 1\ (√3 -√2) * (√3 +√2) \(√3+√2) =
√3+√2=1,73 +1,41 ≈ 3,14 C
3) B
4) a= 407,89
0,01a=0,01*407,89=4,0789≈4,1 A
5)
y=2x-4b
-5 =2*0 -4b
-5= -4b /(-4)
b=5\4 =1,25 B
6) -4x² +6x \ -2x= -2x(2x-3) \ -2x=2x-3 C