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x-3
x-------- =2x+3 /*3
3
x²-3x=6x+9
x²-9x-9=0
Δ=81+36=117
√117=3√13
x₁=(9-3√13):2
x₂=(9+3√13):2
2.Rozwiąż i sprawdź równianie
x+2-3x(x+1)= -(x√3)²
x+2-3x²-3= -3x²
x=1
spr.
x+2-3x(x+1)= -(x√3)²
1+2-3-3=-3
-3=-3