0.2*6/19:3/38=12/19/3/38=6/5/1/6=36/5=7,2
Ответ: 7.2
5x^2+40x+x+8+4x-8=0
<span>a^2*x^2+3x-3a^2*x+4-4a^2-x^2=(a-1)*(a+1)*(x-4)*(x+1)</span>