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Odp. x∈R\{1} R-rzeczywiste
2. D: x≠-3/2 ∧ x≠3/2
4x²+12x-9=0
Δ=144+144=288 √Δ=12√2
x1=(-12-12√2)/8=(-3-3√2)/2
x2=(-3+3√2)/2
3.
D: x≠0 ∧ x≠1
Δ=25-24=1 √Δ=1
x1=(5-1)/2=2
x2=3