Ответ:
x2+2x-3=0
Д: 2^2-4*(-3)=4+12=16
x1=-2+4/2=2/2=1
x2=-2-4/2=-6/2=-3
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Ответ:
x2+2x-3=0
Д: 2^2-4*(-3)=4+12=16
x1=-2+4/2=2/2=1
x2=-2-4/2=-6/2=-3