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b2-9a2-2b+6a=(b-3a)(b+3a)-2(b+3a)=(b+3a)(b+3a-2)
Х/(x-1)=0
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<em>Выражение: (m^2+n-4)^2-(m^2+n-1)*(m^2+n-8)</em>
<em>Решаем по шагам:</em>
<em>1. m^4+2*m^2*n-8*m^2+n^2-8*n+16-(m^2+n-1)*(m^2+n-8)</em>
<em>2. m^2-8*n+16+9*n-8</em>
<em>3. m^2+n+16-8</em>
<em>4. m^2+n+8</em>
<em>Ответ: 8+m^2+n</em>
X=3; 2*3-1/3=6-1/3=5 2/3=17/3
x=1; 2*1-1/1=2-1=1
x=1/2; 2*1/2-1/1/2=1-2=-1
x=-1; 2*(-1)-1/(-1)=-2+1=-1
x=6; 2*6-1/6=12-1/6=11 5/6=71/6
x=100; 2*100-1/100=200-1/100=199 99/100=19999/100