3х²-х-5=0
а=3, b= -1, c= -5
D=(-1)²-4*3*(-5)=1+60=61
[tex]\sqrt{D} =\sqrt{61}[/tex]
[tex]x1=\frac{-(-1)+\sqrt{61} }{2*3} =\frac{1+\sqrt{61}}{6}[/tex];
[tex]x2=\frac{-(-1)-\sqrt{61} }{2*3} =\frac{1-\sqrt{61} }{6}[/tex]
Відповідь: [tex]\frac{1+\sqrt{61} }{6} ; \frac{1-\sqrt{61} }{6}[/tex]
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Answers & Comments
3х²-х-5=0
а=3, b= -1, c= -5
D=(-1)²-4*3*(-5)=1+60=61
[tex]\sqrt{D} =\sqrt{61}[/tex]
[tex]x1=\frac{-(-1)+\sqrt{61} }{2*3} =\frac{1+\sqrt{61}}{6}[/tex];
[tex]x2=\frac{-(-1)-\sqrt{61} }{2*3} =\frac{1-\sqrt{61} }{6}[/tex]
Відповідь: [tex]\frac{1+\sqrt{61} }{6} ; \frac{1-\sqrt{61} }{6}[/tex]