(7+2i)(7-2i) решите плиз
(7+2i)(7-2i)=49-4i^2
(7+2i)(7-2i)=049-4i^2=0
D=0^2-4*(-4)*49=-(-16*49)=-(-784)=784
i1=28/(2*(-4))=-28/8=-3.5i2=-28/(2*(-4))=-(-28/8)=3.5
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(7+2i)(7-2i)=49-4i^2
(7+2i)(7-2i)=0
49-4i^2=0
D=0^2-4*(-4)*49=-(-16*49)=-(-784)=784
i1=28/(2*(-4))=-28/8=-3.5
i2=-28/(2*(-4))=-(-28/8)=3.5