[tex]\displaystyle\bf\\d^{2}+0,6d +0,09-36d^{2} =0\\\\35d^{2} -0,6d-0,09=0\\\\D=(-0,6)^{2} -4\cdot35\cdot(-0,09)=0,36+12,6=12,96=3,6^{2} \\\\\\d_{1} =\frac{0,6-3,6}{70} =-\frac{3}{70} \approx-0,04\\\\\\d_{2} =\frac{0,6+3,6}{70}=\frac{4,2}{70} =0,06 \\\\\\d_{1} +d_{2} =-0,04+0,06\approx0,02[/tex]
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[tex]\displaystyle\bf\\d^{2}+0,6d +0,09-36d^{2} =0\\\\35d^{2} -0,6d-0,09=0\\\\D=(-0,6)^{2} -4\cdot35\cdot(-0,09)=0,36+12,6=12,96=3,6^{2} \\\\\\d_{1} =\frac{0,6-3,6}{70} =-\frac{3}{70} \approx-0,04\\\\\\d_{2} =\frac{0,6+3,6}{70}=\frac{4,2}{70} =0,06 \\\\\\d_{1} +d_{2} =-0,04+0,06\approx0,02[/tex]