Question

360 номер плиз решите

Answer 1

$a);2x^7+x^6+2x^4+x^3+2x+1=0\2x(x^6+x^3+1)+x^6+x^3+1=0\(2x+1)(x^6+x^3+1)=0\2x+1=0Rihgtrarrow x=-frac12\x^6+x^3+1=0\x^3=t,;x^6=t^2\t^2+t+1=0\D=-4cdot1=-3<0;-;pew.HET\OTBET:;x=0\\b);x^7-2x^6+2x^4-4x^3+x-2=0\x(x^6+2x^3+1)-2(x^6+2x^3+1)=0\(x-2)(x^6+2x^3+1)=0\(x-2)(x^3+1)^2=0\x-2=0Rightarrow x=2\x^3+1=0Rightarrow x=-1\OTBET:;x=0,;x=-1$