х²+6х-5=0
а=1; b=6; c=-5
D=b²-4ac=6²-4*1*(-5)=36+20=56=(2√14)²
x1=(-b-√D)/(2a)=(-6-2√14)/2=((2(-3-√14))/2=-3-√14
x2=(-b+√D)/(2a)=-3+√14
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х²+6х-5=0
а=1; b=6; c=-5
D=b²-4ac=6²-4*1*(-5)=36+20=56=(2√14)²
x1=(-b-√D)/(2a)=(-6-2√14)/2=((2(-3-√14))/2=-3-√14
x2=(-b+√D)/(2a)=-3+√14