<span> (-4x-3)*(3x+0,6)=0</span>
<span>-12X^2-2.4x-9x-1.8=0</span>
<span>-12x^2-11.4x-1.8=0</span>
<span>x1=-0.2</span>
<span>x2=-0,75</span>
2 3 4 5 9 10 12 = 900
7800г=7,8кг;350ц=35т.