<span> 3m-6n+mn-2n^2=3(m-2n)+n(m-2n)=(m-2n)(3+n)</span>
6x^2-5+1=0
D=25-4*6*1=1
x1=(5-1):12=4/12=1/3
x2=(5+1):12=1/2
<u>6(x-1/3)(x-1/2)</u>
<em> </em>2(x+1)
<u>3</u>(<u>x-1/3)(x-1/2)</u>
<u /> x+1
<u>
</u>
Подставим в уравнение x=1
1-9-3y+14=0
-3y=-6
y=2
n=2