(3m+3k)-(mk+k²)=3(m+k)-k(m+k)=(m+k)(3-k)
<span>а) 3,5+</span><span>2</span><span>/7 </span><span>+7 </span><span>1/</span><span>2=7/2+2/7+15/2=11 2/7</span>
D1=(b/2)^2-a*c=1+3=4
x=(-(b/2)+-(D1)^(1/2))/a=(-1+-2)/3;
Тогда: x1=-1;x2=1/3.
x1*x2=-1/3.
Ответ: -1/3
2x^2<span>-7x+3=0
D= 49 - 24= 25
x</span>1= 7+5/4= 3
х2= 7- 5/4 = 2/4= 1/2
Ответ: 1/2; 3.