Задача 43123 х^2+4x+53=0...

vk12232751

2019-12-26 11:03:57

х^2+4x+53=0

sova

2019-12-26 11:37:00

D=4^2-4*53=4*(4-53)=4*(-49) <0
sqrt(D)=sqrt(4*49)*sqrt(-1)=2*7*i=14i

x_(1)=(-4-14i)/2; x_(2)=(-4+14i)/2
x_(1)=-2-7i; x_(2)=-2+7i