Д=в^2-4ас;
Д=9-4*2*(-2)=25=5^2
х1=3+5/2*2=2; х2=3-5/4=-0,5
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Д=в^2-4ас;
Д=9-4*2*(-2)=25=5^2
х1=3+5/2*2=2; х2=3-5/4=-0,5