1) х3+х2+x+1=x^2(x+1)+(x+1)=(x+1)(x^2+1)
2)a4+2a3-a-2=a^3(a+2)-(a+2)=(a+2)(a^3-1)=(a+2)(a-1)(a^2-a+1)
4-x(x+8)=11-x^2
4-x^2-8x=11-x^2
-8x=7
x=-7/8
1) х3+х2+x+1=x^2(x+1)+(x+1)=(x+1)(x^2+1)
2)a4+2a3-a-2=a^3(a+2)-(a+2)=(a+2)(a^3-1)=(a+2)(a-1)(a^2-a+1)
4-x(x+8)=11-x^2
4-x^2-8x=11-x^2
-8x=7
x=-7/8