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1.
2.
3.
Odp. B.
2.rozwiąż nierówność 2x²>-4x-1
2x²-4x+1>0
Δ=16-8=8
√Δ=2√2
x1=(4+2√2)/4=1+1/2√2
x2=1-1/2√2
x∈(1-1/2√2,1+1/2√2)
3)Iloczyn (√6-x)(√6+x) wynosi
6-x²
odp B
A.x²-6 b.-x²+6 c.x²-6x