0.6x^2+0.8x-7.8=0 Как решать?

0.6x²+0.8x-7.8=0 10(0.6x²+0.8x-7.8)=10*0 6x²+8x-78=0 D=8²-4*(-78)*6=64+1872=1936=44² [latex]x_{1}= \frac{-8- \sqrt{1936} }{2*6} = \frac{-8-44}{12} = \frac{-52}{12} =-4 \frac{4}{12} =-4 \frac{1}{3} \\ x_{2}= \frac{-8+ \sqrt{1936} }{2*6} = \frac{-8+44}{12} = \frac{36}{12} =3[/latex]