3х²-6х-7=0
D=36-4×3×(-7)=120,
D=√120=2√30
x1=(6-2√30)/6=2(3-√30)/6=(3-√30)/3
x2=(6+2√30)/6=2(3+√30)/6=(3+√30)/3
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3х²-6х-7=0
D=36-4×3×(-7)=120,
D=√120=2√30
x1=(6-2√30)/6=2(3-√30)/6=(3-√30)/3
x2=(6+2√30)/6=2(3+√30)/6=(3+√30)/3